Seeing a John Deere fault code before you even start your machine? Let’s decode it! We’ll explain what these codes signify, why they appear, and how to troubleshoot them effectively.
John Deere diagnostic codes vary depending on the unit: ECU, BCU, ACU, or TCU. Some issues are easily fixed, but others demand immediate expert attention. Often, resetting your John Deere can resolve many of these problems.
Let’s explore this further!
Table of Contents
John Deere Fault Codes: Quick Overview
John Deere equipment can display approximately 20 diagnostic trouble and fault codes. Here’s a concise summary:
| Fault Code Type | Control Unit | Description |
|---|---|---|
| ECU Fault Codes | Engine Control Unit (ECU) | Alerts about potential engine issues like sensor malfunctions or fuel problems. |
| ACU Fault Codes | Armrest Control Unit (ACU) | Provides insights into the overall health and performance of the equipment. |
| BCU Fault Codes | Basic Control Unit (BCU) | Indicates issues with fundamental machine systems, such as power distribution. |
| DCU Fault Codes | Diagnostic Control Unit (DCU) | Provides insights into overall health and performance of the equipment. |
| TCU Fault Codes | Transmission Control Unit (TCU) | Points to transmission problems like gear shifts, hydraulic issues, or clutches. |
John Deere Fault Code Types
| System Component | Problem Zones | Code Range |
|---|---|---|
| Engine Control Unit | Engine sensors, fluids, electrical systems | A00 – A002000 131 |
| Armrest Control Unit | Sensors, temperature gauges, throttle controls | C00 – C00202113 |
| Cornerpost Control Unit | Electrical shorts, missing CAN bus messages, system errors | C03 – C03100116 |
| Tailings Control Unit | Tailings Sensor failures, missing CAN bus messages | E00 – E001511093 |
| Header Control Unit | Height sensor failure, calibration errors, faulty device or wire | E01 – E011544093 |
| Right Control Unit | Fuel level signal error, temperature sensor failure, calibration error | E02 – E021565093 |
| Left Control Unit | Missing CAN bus messages, tank cover error, lighting, electrical system failures | E03 –E03200149112 |
John Deere All Fault Code List and Their Meaning
Diagnostic Trouble Codes (DTCs), their corresponding Control Units, SPN (Suspect Parameter Number), FMI (Failure Mode Identifier), Priority levels, and comprehensive explanations are listed here. This information is current as of 2025.
A00: Engine Control Unit Diagnostic Trouble Codes
| FAULT CODES | Control Unit | SPN | FMI | Priority | DESCRIPTION |
|---|---|---|---|---|---|
| A00 91 09 3 | Engine Control Unit | 91 | 9 | 3 | Throttle input not valid or not received |
| A00 94 01 1 | Engine Control Unit | 94 | 1 | 1 | Fuel pressure too low – less than 80kPa / 11.6 PSI (9540) |
| A00 94 03 1 | Engine Control Unit | 94 | 3 | 1 | Fuel Pressure Sensor (cc# 131) voltage out of range high – greater than 4 V DC (9640, 9560, 9660, 9580, 9680) |
| A00 94 04 1 | Engine Control Unit | 94 | 4 | 1 | Fuel Pressure Sensor (cc# 131) voltage out of range low. (9640, 9560, 9660, 9580, 9680) |
| A00 94 10 2 | Engine Control Unit | 94 | 10 | 2 | The rail pressure drops too fast when the engine is motoring and the high-pressure pump is off. (9640, 9560, 9660, 9580, 9680) |
| A00 94 13 1 | Engine Control Unit | 94 | 13 | 1 | Fuel Pressure Sensor reading is incorrect. (9640, 9560, 9660, 9580, 9680) |
| A00 94 17 2 | Engine Control Unit | 94 | 17 | 2 | During starting, rail pressure is not developed after a short time cranking. (9640, 9560, 9660, 9580, 9680) |
| A00 94 18 2 | Engine Control Unit | 94 | 18 | 2 | Fuel pressure too low – less than 100 kPa / 14.7 PSI at low idle (9540) |
| A00 97 03 2 | Engine Control Unit | 97 | 3 | 2 | Water in Fuel Sensor (cc# 136) voltage out of range high (9640, 9560-Engine Type B, 9660, 9580, 9680) |
| A00 97 04 2 | Engine Control Unit | 97 | 4 | 2 | Water in Fuel Sensor (cc# 136) voltage out of range low (9640, 9560-Engine Type B, 9660, 9580, 9680) |
| A00 97 31 2 | Engine Control Unit | 97 | 31 | 2 | Water is detected in fuel. (9640, 9560-Engine Type B, 9660, 9580, 9680) |
| A00 100 01 1 | Engine Control Unit | 100 | 1 | 1 | Oil Pressure Sensor is open after the engine rpm is above cranking speed |
| A00 100 04 2 | Engine Control Unit | 100 | 4 | 2 | Oil Pressure Sensor is closed when the engine is not running (9640, 9560, 9660, 9580, 9680) |
| A00 105 00 1 | Engine Control Unit | 105 | 0 | 1 | Engine Manifold Air Temperature Sensor is above 100°C (Applicable only to Engine Type C – 9560). |
| A00 105 03 2 | Engine Control Unit | 105 | 3 | 2 | Engine Manifold Air Temperature Sensor voltage is out of range high. The device or wiring is faulty. (Applicable to various models: 9640, 9560, 9660, 9580, 9680). |
| A00 105 04 2 | Engine Control Unit | 105 | 4 | 2 | Engine Manifold Air Temperature Sensor voltage is out of range low. The device or wiring is faulty. (Applicable to various models: 9640, 9560, 9660, 9580, 9680). |
| A00 105 16 2 | Engine Control Unit | 105 | 16 | 2 | Engine Manifold Air temperature above 88°C / 190°F (Moderately severe level). Maximum power level is derated. Power boost is disabled. |
| A00 107 00 2 | Engine Control Unit | 107 | 0 | 2 | Air Filter Restricted Switch indicates a plugged air filter. |
| A00 110 00 1 | Engine Control Unit | 110 | 0 | 1 | Engine coolant temperature above 115°C / 240°F (Most severe level). Maximum power level is derated. Power boost is disabled. |
| A00 110 03 2 | Engine Control Unit | 110 | 3 | 2 | Engine Coolant Temperature Sensor voltage is out of range high. The device or wiring is faulty. |
| A00 110 04 2 | Engine Control Unit | 110 | 4 | 2 | Engine Coolant Temperature Sensor voltage is out of range low. The device or wiring is faulty. |
| A00 110 15 2 | Engine Control Unit | 110 | 15 | 2 | Engine Coolant Temperature is above 105°C. (Applicable to Engine Type C – 9560). |
| A00 110 16 2 | Engine Control Unit | 110 | 16 | 2 | Engine coolant temperature above 110°C / 230°F for models 9640, 9560, 9660, 9580, and 9680, or above 100°C / 212°F for model 9540. Derated power. |
| A00 111 01 1 | Engine Control Unit | 111 | 1 | 1 | Coolant level low. Engine coolant temperature above 125°C / 257°F. Maximum power level is derated. Power boost is disabled. |
| A00 158 17 2 | Engine Control Unit | 158 | 17 | 2 | Controller not powered down properly. (Applicable to various models: 9640, 9560, 9660, 9580, 9680). |
| A00 174 00 2 | Engine Control Unit | 174 | 0 | 2 | Engine fuel temperature is too high (greater than 75°C / 167°F). Injector pump may be damaged due to reduced fuel lubrication. (Applicable to model 9540). |
| A00 174 03 2 | Engine Control Unit | 174 | 3 | 2 | Engine Fuel Temperature Sensor voltage out of range high. The device or wiring is faulty. Injector pump may be damaged. (Applicable to various models). |
| A00 174 04 2 | Engine Control Unit | 174 | 4 | 2 | Engine Fuel Temperature Sensor voltage out of range low. The device or wiring is faulty. Injector pump may be damaged. (Applicable to various models). |
| A00 174 15 2 | Engine Control Unit | 174 | 15 | 2 | Engine fuel temperature above normal range (greater than 65°C / 149°F). Maximum power level and power boost are derated. (Applicable to model 9540). |
| A00 174 16 2 | Engine Control Unit | 174 | 16 | 2 | Engine fuel temperature above normal range (greater than 65°C / 149°F for models 9640, 9560, 9660, 9580, 9680, or greater than 73°C / 163°F for model 9540). Maximum power level and power boost are derated. |
| A00 174 31 2 | Engine Control Unit | 174 | 31 | 2 | Engine Fuel Temperature Sensor is out of range. Maximum power level and power boost are derated. (Applicable to model 9540). |
| A00 189 00 3 | Engine Control Unit | 189 | 0 | 3 | Low fuel pressure detected in the engine (Applicable to model 9540). |
| A00 190 00 1 | Engine Control Unit | 190 | 0 | 1 | Engine over-speed condition observed, with RPM greater than 2800 (Applicable to model 9540). |
| A00 190 16 3 | Engine Control Unit | 190 | 16 | 3 | Engine speed exceeds the limit of 2800 RPM. Engine Control Unit reduces fuel flow until the speed is below 2200 RPM (Applicable to model 9540). |
| A00 611 03 1 | Engine Control Unit | 611 | 3 | 1 | The injector driver has detected a short circuit to the battery in the injector wiring (Applicable to various models: 9640, 9560, 9660, 9580, 9680). |
| A00 611 04 1 | Engine Control Unit | 611 | 4 | 1 | The injector driver has detected a short circuit to ground in the injector wiring (Applicable to various models: 9640, 9560, 9660, 9580, 9680). |
| A00 627 01 2 | Engine Control Unit | 627 | 1 | 2 | All injector currents are out of specification. The injector pull-in current is too low, or the injector hold-in current is incorrect (Applicable to various models: 9640, 9560, 9660, 9580, 9680). |
| A00 627 04 2 | Engine Control Unit | 627 | 4 | 2 | Engine Control Unit Power (cc# 042) is missing at the Engine Control Unit while Electronic Power (cc# 021) is on (Applicable to model 9540). |
| A00 629 19 2 | Engine Control Unit | 629 | 19 | 2 | Engine Control Unit not receiving messages from the Pump (Applicable to model 9540). |
| A00 632 02 2 | Engine Control Unit | 632 | 2 | 2 | Fuel shutoff error condition detected (Applicable to model 9540). |
| A00 632 05 2 | Engine Control Unit | 632 | 5 | 2 | The Engine Control Unit does not detect a change in engine speed after the Key Switch is turned off. Fuel shutoff not functioning correctly (Applicable to model 9540). |
| A00 636 02 2 | Engine Control Unit | 636 | 2 | 2 | Electrical noise detected on Pump Position Sensor + (cc# 172) and/or Pump Position Sensor – (cc# 173). |
| A00 636 08 2 | Engine Control Unit | 636 | 8 | 2 | Pump Position Sensor signal is missing. |
| A00 636 10 2 | Engine Control Unit | 636 | 10 | 2 | Pump Position Sensor signal has an incorrect pulse pattern. |
| A00 637 02 2 | Engine Control Unit | 637 | 2 | 2 | Electrical noise detected on Pump Position Sensor + (cc# 174) and/or Pump Position Sensor – (cc# 175). |
| A00 637 07 2 | Engine Control Unit | 637 | 7 | 2 | Position relationship between Engine Speed Sensor and Pump Position Sensor not correct (Applicable to various models: 9640, 9560, 9660, 9580, 9680). |
| A00 637 08 2 | Engine Control Unit | 637 | 8 | 2 | Engine Speed Sensor signal is missing. |
| A00 637 10 2 | Engine Control Unit | 637 | 10 | 2 | Engine Speed Sensor signal has an incorrect pulse pattern. |
| A00 651 05 2 | Engine Control Unit (ECU) | 651 | 5 | 2 | The current to Injector #1 is less than expected. Applicable to various models: 9640, 9560, 9660, 9580, 9680. |
| A00 651 06 2 | Engine Control Unit (ECU) | 651 | 6 | 2 | The current to Injector #1 increases too rapidly. Applicable to various models: 9640, 9560, 9660, 9580, 9680. |
| A00 651 07 2 | Engine Control Unit (ECU) | 651 | 7 | 2 | The fuel flow to cylinder #1 is lower than expected. Applicable to various models: 9640, 9560-Engine Type B, 9660, 9580, 9680. |
| A00 652 05 2 | Engine Control Unit (ECU) | 652 | 5 | 2 | The current to Injector #2 is less than expected. Applicable to various models: 9640, 9560, 9660, 9580, 9680. |
| A00 652 06 2 | Engine Control Unit (ECU) | 652 | 6 | 2 | The current to Injector #2 increases too rapidly. Applicable to various models: 9640, 9560, 9660, 9580, 9680. |
| A00 652 07 2 | Engine Control Unit (ECU) | 652 | 7 | 2 | The fuel flow to cylinder #2 is lower than expected. Applicable to various models: 9640, 9560-Engine Type B, 9660, 9580, 9680. |
| A00 653 05 2 | Engine Control Unit (ECU) | 653 | 5 | 2 | The current to Injector #3 is less than expected. Applicable to various models: 9640, 9560, 9660, 9580, 9680. |
| A00 653 06 2 | Engine Control Unit (ECU) | 653 | 6 | 2 | The current to Injector #3 increases too rapidly. Applicable to various models: 9640, 9560, 9660, 9580, 9680. |
| A00 653 07 2 | Engine Control Unit (ECU) | 653 | 7 | 2 | The fuel flow to cylinder #3 is lower than expected. Applicable to various models: 9640, 9560-Engine Type B, 9660, 9580, 9680. |
| A00 654 05 2 | Engine Control Unit (ECU) | 654 | 5 | 2 | The current to Injector #4 is less than expected. Applicable to various models: 9640, 9560, 9660, 9580, 9680. |
| A00 654 06 2 | Engine Control Unit (ECU) | 654 | 6 | 2 | The current to Injector #4 increases too rapidly. Applicable to various models: 9640, 9560, 9660, 9580, 9680. |
| A00 654 07 2 | Engine Control Unit (ECU) | 654 | 7 | 2 | The fuel flow to cylinder #4 is lower than expected. Applicable to various models: 9640, 9560-Engine Type B, 9660, 9580, 9680. |
| A00 655 05 2 | Engine Control Unit (ECU) | 655 | 5 | 2 | The current to Injector #5 is less than expected. Applicable to various models: 9640, 9560, 9660, 9580, 9680. |
| A00 655 06 2 | Engine Control Unit (ECU) | 655 | 6 | 2 | The current to Injector #5 increases too rapidly. Applicable to various models: 9640, 9560, 9660, 9580, 9680. |
| A00 655 07 2 | Engine Control Unit (ECU) | 655 | 7 | 2 | The fuel flow to cylinder #5 is lower than expected. Applicable to various models: 9640, 9560-Engine Type B, 9660, 9580, 9680. |
| A00 656 05 2 | Engine Control Unit (ECU) | 656 | 5 | 2 | The current to Injector #6 is less than expected. Applicable to various models: 9640, 9560, 9660, 9580, 9680. |
| A00 656 06 2 | Engine Control Unit (ECU) | 656 | 6 | 2 | The current to Injector #6 increases too rapidly. Applicable to various models: 9640, 9560, 9660, 9580, 9680. |
| A00 656 07 2 | Engine Control Unit (ECU) | 656 | 7 | 2 | The fuel flow to cylinder #6 is lower than expected. Applicable to various models: 9640, 9560-Engine Type B, 9660, 9580, 9680. |
| A00 676 03 2 | Engine Control Unit (ECU) | 676 | 3 | 2 | The Glow Plug Relay output is on when the relay is not energized by the Engine Control Unit. Applicable to model 9560-Engine Type C. |
| A00 676 05 2 | Engine Control Unit (ECU) | 676 | 5 | 2 | The Glow Plug Relay output is off when the relay is energized by the Engine Control Unit. Applicable to model 9560-Engine Type C. |
| A00 729 03 2 | Engine Control Unit (ECU) | 729 | 3 | 2 | Inlet Air Heater Relay Output (cc# 189) is high when the Engine Control Unit is not energizing the Glow Plug Relay. Applicable to model 9540. |
| A00 729 05 2 | Engine Control Unit (ECU) | 729 | 5 | 2 | Inlet Air Heater Relay Outpu |
| A00 1076 02 2 | Engine Control Unit (ECU) | 1076 | 2 | 2 | The High Pressure Solenoid within the pump is continuously energized, and the Pump Control Unit is unable to detect closure of the High Pressure Solenoid Valve, or the internal pump speed sensor is broken. |
| A00 1077 07 2 | Engine Control Unit (ECU) | 1077 | 7 | 2 | The High Pressure Solenoid Valve is closed when the Engine Control Unit is commanding the Pump Control Unit to stop delivering fuel. |
| A00 1077 11 2 | Engine Control Unit (ECU) | 1077 | 11 | 2 | The Pump Control Unit senses an abnormal voltage on Pump Power (cc# 061). |
| A00 1077 12 2 | Engine Control Unit (ECU) | 1077 | 12 | 2 | The Pump Control Unit detects an error during a self-test. |
| A00 1077 19 2 | Engine Control Unit (ECU) | 1077 | 19 | 2 | The Pump Control Unit is not receiving any ECU/CAN messages while detecting a signal on Crank Speed Out (cc# 187). |
| A00 1077 31 1 | Engine Control Unit (ECU) | 1077 | 31 | 1 | Injection Pump initiated engine protection due to Diagnostic Trouble Code 174.31, 1076.02, 1077.12, 1078.07, or 1078.31. Engine will derate. |
| A00 1078 07 2 | Engine Control Unit (ECU) | 1078 | 7 | 2 | The Pump Control Unit receives a crank signal from the Engine Control Unit that is moderately different from the internal timing within the Pump. Engine will be derated. |
| A00 1078 11 2 | Engine Control Unit (ECU) | 1078 | 11 | 2 | The Engine Control Unit detects a difference between the internal pump timing and engine speed. |
| A00 1078 31 2 | Engine Control Unit (ECU) | 1078 | 31 | 2 | The Pump Control Unit receives a crank signal from the Engine Control Unit that is extremely different from the internal timing within the Pump. Engine will be derated. |
| A00 1079 03 2 | Engine Control Unit (ECU) | 1079 | 3 | 2 | Sensor Supply Voltage 1 (cc# 131) is too high (greater than 4.95 V DC). |
| A00 1079 04 3 | Engine Control Unit (ECU) | 1079 | 4 | 3 | Sensor Supply Voltage 1 (cc# 131) is too low (less than 4.0 V DC). |
| A00 1080 03 1 | Engine Control Unit (ECU) | 1080 | 3 | 1 | Rail Pressure Sensor Power (cc# 721) voltage is too high. |
| A00 1080 04 1 | Engine Control Unit (ECU) | 1080 | 4 | 1 | Rail Pressure Sensor Power (cc# 721) voltage is too low. |
| A00 1080 04 3 | Engine Control Unit (ECU) | 1080 | 4 | 3 | Rail Pressure Sensor Power (cc# 721) voltage is too low. |
| A00 1347 03 1 | Engine Control Unit (ECU) | 1347 | 3 | 1 | Shorted to power: CC# 178. |
| A00 1347 05 2 | Engine Control Unit (ECU) | 1347 | 5 | 2 | Driver detects problem in circuit to Pump Solenoid 1: Low (CC# 178). |
| A00 1347 07 2 | Engine Control Unit (ECU) | 1347 | 7 | 2 | Rail Pressure Control is unable to match required rail pressure. |
| A00 1347 10 2 | Engine Control Unit (ECU) | 1347 | 10 | 2 | Pump Solenoid 1 is not delivering expected fuel flow. |
| A00 1348 05 2 | Engine Control Unit (ECU) | 1348 | 5 | 2 | Driver detects problem in circuit to Pump Solenoid 2: Low (CC# 179). |
| A00 1348 10 2 | Engine Control Unit (ECU) | 1348 | 10 | 2 | Pump Solenoid 2 is not delivering expected fuel flow. |
| A00 1485 02 2 | Engine Control Unit (ECU) | 1485 | 2 | 2 | Pump Power (CC# 061) is powered when Engine Control Unit is off. |
| A00 1569 31 2 | Engine Control Unit (ECU) | 1569 | 31 | 2 | Engine protection – power derated due to other faults. This code occurs in conjunction with 105.16, 110.00, 110.03, 110.04, and 110.16. |
| A00 2000 13 1 | Engine Control Unit (ECU) | 2000 | 13 | 1 | Engine Control Unit security violation. |
C00: Armrest Control Unit Diagnostic Trouble Codes
| FAULT_CODES | CONTROL UNIT | SPN | FMI | PRIORITY | DESCRIPTION |
|---|---|---|---|---|---|
| C00 158 04 3 | Armrest Control Unit | 158 | 4 | 3 | Control Circuit Power (CC# 023) is below 10.5 V DC. |
| C00 170 03 3 | Armrest Control Unit | 170 | 3 | 3 | CLIMATRAK Cab Air Temperature Sensor voltage too high – greater than 4.8 V DC. Indicates that the sensor resistance is greater than 60KΩ (-22°F or -30°C). |
| C00 170 04 3 | Armrest Control Unit | 170 | 4 | 3 | CLIMATRAK Cab Air Temperature Sensor voltage too low – less than 0.1 V DC. Indicates that the sensor resistance is less than 50Ω (293°F or 145°C). |
| C00 172 03 3 | Armrest Control Unit | 172 | 3 | 3 | CLIMATRAK Outside Air Temperature Sensor voltage too high – greater than 4.8 V DC. Indicates that the sensor resistance is greater than 60KΩ (-22°F or -30°C). |
| C00 172 04 3 | Armrest Control Unit | 172 | 4 | 3 | CLIMATRAK Outside Air Temperature Sensor voltage too low – less than 0.1 V DC. Indicates that the sensor resistance is less than 50Ω (293°F or 145°C). |
| C00 190 09 3 | Armrest Control Unit | 190 | 9 | 3 | CAN Bus message missing from the Engine Control Unit – Engine Speed. |
| C00 605 04 3 | Armrest Control Unit | 605 | 4 | 3 | CLIMATRAK Lo Pressure Switch (CC# 914) is 12 V DC. A CAN Bus message from the Left Control Unit indicates that the CLIMATRAK Hi Pressure Switch (CC# 915) is 0 V DC. The CLIMATRAK Hi Pressure Switch is open or there is a harness problem. |
| C00 627 03 1 | Armrest Control Unit | 627 | 3 | 1 | Delayed Power (CC# 006) voltage is above 16 V DC. High voltage situation must be resolved. |
| C00 627 04 3 | Armrest Control Unit | 627 | 4 | 3 | Delayed Power (CC# 006) is below 10.5 V DC. |
| C00 628 12 1 | Armrest Control Unit | 628 | 12 | 1 | Controller cannot exit the boot block program. Disconnect Armrest Control Unit connectors X653 and X654. Reconnect connectors. Replace Armrest Control Unit if the condition persists. |
| C00 630 11 1 | Armrest Control Unit | 630 | 11 | 1 | Controller failed EEPROM test at power-up. Replace Armrest Control Unit if the condition persists. |
| C00 639 19 3 | Armrest Control Unit | 639 | 19 | 3 | CAN Bus messages are not being transmitted or received correctly. Possible effects are none, slow response, or machine down. |
| C00 875 04 3 | Armrest Control Unit | 875 | 4 | 3 | CAN Bus message from the Left Control Unit indicates that CLIMATRAK Clutch Signal (CC# 913) is 12 V DC. CLIMATRAK Lo Pressure Switch (CC# 914) is 0 V DC. The CLIMATRAK Lo Pressure Switch is open or there is a harness problem. |
| C00 1490 08 2 | Armrest Control Unit | 1490 | 8 | 2 | Backshaft speed is unknown. Damage could occur to the feeder house if the reverser is engaged while the backshaft is rotating in the forward direction. |
| C00 1498 11 3 | Armrest Control Unit | 1498 | 11 | 3 | The header engage output transistor detects an open, short, overvoltage, or over-temperature condition. The Armrest Control Unit will disengage the header. The fault condition must be removed before the header can be engaged. |
| C00 1499 11 3 | Armrest Control Unit | 1499 | 11 | 3 | The separator engage output transistor detects an open, short, overvoltage, or over-temperature condition. The Armrest Control Unit will disengage the separator. The fault condition must be removed before the separator can be engaged. |
| C00 1499 12 2 | Armrest Control Unit | 1499 | 12 | 2 | The Separator Engage fault detection circuit indicates a failure. This is an important disengagement override system. Replace the Armrest Control Unit if the condition persists. |
| C00 1504 11 1 | Armrest Control Unit | 1504 | 11 | 1 | The Seat Switch has been closed continuously for 6 hours. The switch or the wiring harness is shorted. The header will not disengage when the operator has left the seat. This must be corrected. |
| C00 1505 03 3 | Armrest Control Unit | 1505 | 3 | 3 | HEADERTRAK Sensitivity Adjust voltage is too high – greater than 4.5 V DC. The device or wiring is faulty. |
| C00 1505 04 3 | Armrest Control Unit | 1505 | 4 | 3 | HEADERTRAK Sensitivity Adjust voltage is too low – less than 0.5 V DC. The device or wiring is faulty. |
| C00 1506 03 3 | Armrest Control Unit | 1506 | 3 | 3 | HEADERTRAK Rate Adjust voltage is too high – greater than 4.5 V DC. The device or wiring is faulty. |
| C00 1506 04 3 | Armrest Control Unit | 1506 | 4 | 3 | HEADERTRAK Rate Adjust voltage is too low – less than 0.5 V DC. The device or wiring is faulty. |
| C00 1505 10 3 | Armrest Control Unit | 1505 | 10 | 3 | HEADERTRAK Rate Adjust calibration fault: The potentiometer was calibrated in the wrong direction, or the difference between the two calibration endpoints is less than 2.00 volts. This diagnostic trouble code is only displayed during a calibration fault and is not stored. |
| C00 1547 03 3 | Armrest Control Unit | 1547 | 3 | 3 | CLIMATRAK Core Temperature Sensor voltage too high – greater than 4.47 V DC. This indicates that the sensor resistance is greater than 101KΩ (-4°F or -20°C). |
| C00 1547 04 3 | Armrest Control Unit | 1547 | 4 | 3 | CLIMATRAK Core Temperature Sensor voltage too low – less than 0.1 V DC. This indicates that the sensor resistance is less than 52Ω (356°F or 180°C). |
| C00 1548 03 3 | Armrest Control Unit | 1548 | 3 | 3 | CLIMATRAK Outlet Air Temperature Sensor voltage too high – greater than 4.8 V DC. This indicates that the sensor resistance is greater than 60KΩ (-22°F or -30°C). |
| C00 1548 04 3 | CLIMATRAK Outlet Air Temp. Sensor | 1548 | 4 | 3 | CLIMATRAK Outlet Air Temperature Sensor voltage is too low – less than 0.1 V DC. Indicates that the sensor resistance is less than 50Ω (293°F or 145°C). |
| C00 1549 07 3 | CLIMATRAK Water Valve | 1549 | 7 | 3 | CLIMATRAK Water Valve position is greater than 30% different than the commanded position. |
| C00 200011 03 3 | CLIMATRAK Solar Sensor | 200011 | 3 | 3 | CLIMATRAK Solar Sensor voltage is too high – greater than 4.8 V DC. The device or wiring is faulty. |
| C00 200011 04 3 | CLIMATRAK Solar Sensor | 200011 | 4 | 3 | CLIMATRAK Solar Sensor voltage is too low – less than 1.5 V DC. The device or wiring is faulty. |
| C00 200017 09 3 | Cornerpost Control Unit | 200017 | 9 | 3 | CAN Bus message(s) missing from Cornerpost Control Unit. |
| C00 200018 09 3 | Left Control Unit | 200018 | 9 | 3 | CAN Bus message(s) missing from Left Control Unit. |
| C00 200201 11 3 | Separator Engage Switch | 200201 | 11 | 3 | Separator Engage Switch inputs are incorrect. |
| C00 200202 11 3 | Header Engage Switch | 200202 | 11 | 3 | Header Engage Switch inputs are incorrect. |
C03: Cornerpost Control Unit Diagnostic Trouble Codes
| FAULT_CODES | CONTROL UNIT | SPN | FMI | PRIORITY | DESCRIPTION |
|---|---|---|---|---|---|
| C03 96 09 3 | Right Control Unit | 96 | 9 | 3 | A CAN Bus message is missing from the Right Control Unit, specifically the Fuel Level data. |
| C03 110 09 3 | Engine Control Unit | 110 | 9 | 3 | A CAN Bus message is missing from the Engine Control Unit, indicating an issue with the Engine Coolant Temperature data. |
| C03 190 09 3 | Engine Control Unit | 190 | 9 | 3 | A CAN Bus message is missing from the Engine Control Unit, indicating a problem with the Engine Speed data. |
| C03 627 03 3 | – | 627 | 3 | 3 | The voltage for the Delayed Power circuit (cc# 006) is out of range and too high, exceeding 16 V DC. |
| C03 628 12 1 | Cornerpost Control Unit | 628 | 12 | 1 | The Controller is unable to exit the boot block program, and the suggested action is to disconnect the Cornerpost Control Unit connector X500, then reconnect it. If the condition persists, the Cornerpost Control Unit should be replaced. |
| C03 630 11 1 | Cornerpost Control Unit | 630 | 11 | 1 | The EEPROM has failed the test during power-up, and the recommended course of action is to replace the Cornerpost Control Unit if the condition persists. |
| C03 639 19 3 | – | 639 | 19 | 3 | The CAN Bus messages are not being transmitted or received correctly. This can lead to various effects, such as no response, slow response, or even machine malfunctions. |
| C03 1079 03 3 | – | 1079 | 3 | 3 | The voltage for the Concave Position Sensor supply is too high, exceeding 5.5 V DC, indicating a potential issue with the sensor or its wiring. |
| C03 1079 04 3 | – | 1079 | 4 | 3 | The voltage for the Concave Position Sensor supply is too low, falling below 4.5 V DC, suggesting a possible problem with the sensor or its wiring. |
| C03 1486 03 3 | – | 1486 | 3 | 3 | The voltage for the Concave Position Sensor is too high, exceeding 4.5 V DC, pointing to a potential fault in the sensor or its wiring. |
| C03 1486 04 3 | – | 1486 | 4 | 3 | The voltage for the Concave Position Sensor is too low, dropping below 0.5 V DC, indicating a potential issue with the sensor or its wiring. |
| C03 1487 03 3 | – | 1487 | 3 | 3 | The voltage for the Dimmer circuit is too high, exceeding 4.5 V DC, suggesting a possible fault in the device or its wiring. |
| C03 1487 04 3 | – | 1487 | 4 | 3 | The voltage for the Dimmer circuit is too low, falling below 0.5 V DC, indicating a potential problem with the device or its wiring. |
| C03 1492 08 3 | Cornerpost Control Unit | 1492 | 8 | 3 | The output transistor for the Cab Interior Backlighting has detected an open, short, overvoltage, or overtemperature condition. As a result, the Cornerpost Control Unit will turn off the backlighting. The backlighting can only be turned on again after resolving the fault condition. |
| C03 1493 09 3 | Master Tailings Sensor | 1493 | 9 | 3 | A CAN Bus message is missing from the Master Tailings Sensor, specifically regarding the Tailings Volume data. |
| C03 1500 11 3 | Cornerpost Display Unit 1 | 1500 | 11 | 3 | A switch on Cornerpost Display Unit 1 has remained closed for longer than 30 seconds, indicating a possible issue with the switch or its circuit. |
| C03 1501 11 3 | Cornerpost Display Unit 2 | 1501 | 11 | 3 | A switch on Cornerpost Display Unit 2 has remained closed for longer than 30 seconds, indicating a possible issue with the switch or its circuit. |
| C03 1502 11 3 | Cornerpost Display Unit 3 | 1502 | 11 | 3 | A switch on Cornerpost Display Unit 3 has remained closed for longer than 30 seconds, indicating a possible issue with the switch or its circuit. |
| C03 1503 09 3 | Armrest Control Unit | 1503 | 9 | 3 | A CAN Bus message is missing from the Armrest Control Unit, specifically regarding the Armrest Switch Status. |
| C03 1510 09 3 | Right Control Unit | 1510 | 9 | 3 | A CAN Bus message is missing from the Right Control Unit, particularly related to the Combine Temperatures data. |
| C03 1511 09 3 | Right Control Unit | 1511 | 9 | 3 | A CAN Bus message is missing from the Right Control Unit, particularly related to the Grain Loss data. |
| C03 1515 09 3 | Header Control Unit | 1515 | 9 | 3 | A CAN Bus message is missing from the Header Control Unit, specifically regarding the Header Data. |
| C03 1552 03 3 | – | 1552 | 3 | 3 | The CLIMATRAK Temperature Setpoint Adjust voltage is too high, exceeding 4.5 V DC, indicating a possible fault in the device or its wiring. |
| C03 1552 04 3 | – | 1552 | 4 | 3 | The CLIMATRAK Temperature Setpoint Adjust voltage is too low, falling below 0.5 V DC, indicating a potential issue with the device or its wiring. |
| C03 1552 13 3 | – | 1552 | 13 | 3 | The CLIMATRAK Temperature Setpoint Adjust is not calibrated. It is recommended to refer to Diagnostic Address C03-135 for calibration. |
| C03 1553 03 3 | – | 1553 | 3 | 3 | The CLIMATRAK Fan Speed Adjust voltage is too high, exceeding 4.5 V DC, suggesting a possible fault in the device or its wiring. |
| C03 1553 04 3 | – | 1553 | 4 | 3 | The CLIMATRAK Fan Speed Adjust voltage is too low, falling below 0.5 V DC, indicating a potential issue with the device or its wiring. |
| C03 1553 13 3 | – | 1553 | 13 | 3 | The CLIMATRAK Fan Speed Adjust is not calibrated. It is recommended to refer to Diagnostic Address C03-134 for calibration. |
| C03 1565 09 3 | Armrest Control Unit | 1565 | 9 | 3 | A CAN Bus message is missing from the Armrest Control Unit, specifically regarding the Separator and Header Engage Status. |
| C03 1567 09 3 | Header Control Unit | 1567 | 9 | 3 | A CAN Bus message is missing from the Header Control Unit, specifically regarding the Control Mode. |
| C03 100100 09 3 | Left Control Unit | 100100 | 9 | 3 | A CAN Bus message is missing from the Left Control Unit, related to System Data. |
| C03 100101 09 3 | Left Control Unit 2 | 100101 | 9 | 3 | A CAN Bus message is missing from the Left Control Unit 2, related to System Data. |
| C03 100106 11 3 | Cornerpost Display Unit 4 | 100106 | 11 | 3 | A switch on Cornerpost Display Unit |
E00 Tailings Control Unit Diagnostic Trouble Codes
| Fault Code | Control Unit | SPN | FMI | Priority | DESCRIPTION |
|---|---|---|---|---|---|
| E00 190 09 3 | Engine Control Unit | 190 | 09 | 3 | A CAN Bus message is missing from the Engine Control Unit, specifically related to the Engine Speed data. |
| E00 628 12 2 | – | 628 | 12 | 2 | The controller cannot exit the boot block program. It is advised to turn the Key Switch to the OFF position, wait for 30 seconds, and replace the Master Tailings Sensor if the condition persists. |
| E00 630 11 2 | – | 630 | 11 | 2 | The EEPROM failed the test during power-up. To address this issue, it is recommended to replace the Master Tailings Sensor if the condition persists. |
| E00 639 09 3 | Tailings Control Unit | 639 | 09 | 3 | CAN Bus messages are not received by the Tailings Control Unit promptly, potentially leading to none, slow response, or machine down situations. Other DTCs will indicate the lost message. |
| E00 639 19 3 | – | 639 | 19 | 3 | CAN Bus messages are not being correctly transmitted or received, potentially resulting in none, slow response, or machine down scenarios. |
| E00 1493 11 3 | – | 1493 | 11 | 3 | Tailings system failure with an unknown cause. |
| E00 1493 15 3 | – | 1493 | 15 | 3 | Tailings system calibration is out of range high, indicating that sensor detectors receive too little light. It is advised to recalibrate the system. If the situation persists, a sensor may be dirty or failed. |
| E00 1493 17 3 | – | 1493 | 17 | 3 | Tailings system calibration is out of range low, indicating that sensor detectors receive too much light. It is advised to recalibrate the system. If the situation persists, a sensor may be missing or failed. |
| E00 1494 08 3 | Master Tailings Sensor | 1494 | 08 | 3 | A stuck photo receiver is detected in the Master Tailings Sensor. It is recommended to clean the sensor, and if the condition persists, replace it. |
| E00 1494 11 3 | – | 1494 | 11 | 3 | Master Tailings Sensor failure with an unknown cause. |
| E00 1495 08 3 | Slave Tailings Sensor | 1495 | 08 | 3 | A stuck photo receiver is detected in the Slave Tailings Sensor. It is advised to clean the sensor, and if the condition continues, replace it. |
| E00 1495 11 3 | – | 1495 | 11 | 3 | Slave Tailings Sensor failure with an unknown cause. |
| E00 1496 07 3 | – | 1496 | 07 | 3 | Tailings elevator paddle is missing. |
| E00 1511 09 3 | Right Control Unit | 1511 | 09 | 3 | A CAN Bus message is missing from the Right Control Unit, specifically related to the Seed Size data. |
E01: Header Control Unit Diagnostic Trouble Codes
| FAULT_CODES | CONTROL UNIT | SPN | FMI | PRIORITY | Description |
|---|---|---|---|---|---|
| E01 84 09 3 | Cornerpost Control Unit | 84 | 9 | 3 | A CAN Bus message is missing from the Cornerpost Control Unit, specifically related to the Wheel Speed data. |
| E01 190 09 3 | Engine Control Unit | 190 | 9 | 3 | A CAN Bus message is missing from the Engine Control Unit, specifically related to the Engine Speed data. |
| E01 627 03 1 | – | 627 | 3 | 1 | Controller Supply voltage is out of the high range, exceeding 16 V DC. |
| E01 628 12 1 | – | 628 | 12 | 1 | The controller cannot exit the boot block program. It is advised to disconnect the Header Control Unit connector X205, reconnect the connector, and replace the Header Control Unit if the condition persists. |
| E01 630 11 3 | – | 630 | 11 | 3 | The system is not calibrated, or the EEPROM failed the test during power-up. It is recommended to calibrate the header, and if the condition persists, replace the Header Control Unit. |
| E01 639 13 3 | Header Control Unit | 639 | 13 | 3 | Multiple CAN Bus messages have not been received by the Header Control Unit promptly, potentially resulting in no effect, slowed response, or no response. |
| E01 1079 03 2 | – | 1079 | 3 | 2 | Height Sensor Power (cc# 481) voltage is too high, exceeding 5.25 V DC. Height Sensor Power is used to power the Return To Cut Sensor, Reel Fore/Aft Position Sensor, Deck Plate Position Sensor, Right HEADERTRAK Sensor, Center HEADERTRAK Sensor, and Left HEADERTRAK Sensor. The voltage regulator of the Header Control Unit is faulty, or there is a short in the wiring. |
| E01 1079 04 2 | – | 1079 | 4 | 2 | Height Sensor Power (cc# 481) voltage is too low, less than 4.75 V DC. Height Sensor Power is used to power the Return To Cut Sensor, Reel Fore/Aft Position Sensor, Deck Plate Position Sensor, Right HEADERTRAK Sensor, Center HEADERTRAK Sensor, and Left HEADERTRAK Sensor. The voltage regulator of the Header Control Unit is faulty, or there is a short in the wiring. |
| E01 1080 03 2 | – | 1080 | 3 | 2 | Height Sensor Power 2 (cc# 471) voltage is too high, exceeding 5.25 V DC. Height Sensor Power 2 is used to power the HEADERTRAK Angle Sensor and the Header Raise Pressure Sensor. The voltage regulator of the Header Control Unit is faulty, or there is a short in the wiring. |
| E01 1080 04 2 | – | 1080 | 4 | 2 | Height Sensor Power 2 (cc# 471) voltage is too low, less than 4.75 V DC. Height Sensor Power 2 is used to power the HEADERTRAK Angle Sensor and the Header Raise Pressure Sensor. The voltage regulator of the Header Control Unit is faulty, or there is a short in the wiring. |
| E01 1515 13 2 | – | 1515 | 13 | 2 | The HEADERTRAK system is not calibrated for the currently attached header. It is advised to perform the calibration procedure. |
| E01 1516 13 2 | HEADERTRAK | – | 13 | 2 | The Ground Pressure system for the currently attached header is not calibrated. Perform the calibration procedure. |
| E01 1517 04 2 | – | 706 | 4 | 2 | Header Raise Pressure (cc# 706) voltage is too low, measuring less than 0.25 V DC. |
| E01 1518 02 3 | – | – | 2 | 3 | Circuit codes 436, 487, 488, and 489 changed while HEADERTRAK was in automatic mode. These are header select lines that identify the type of header on the combine. |
| E01 1518 07 3 | – | – | 7 | 3 | Header not connected or invalid connection. Circuit codes 436, 487, 488, and 489 are the header select lines that identify the type of header on the combine. |
| E01 1518 14 3 | – | – | 14 | 3 | Cannot activate HEADERTRAK Stubble Height or HEADERTRAK Tilt Header sensors are not available. |
| E01 1519 11 2 | Header Control Unit | – | 11 | 2 | Header raise valve driver detects an open, short, overvoltage, or over-temperature condition. The Header Control Unit will not actuate the Header Raise Valve until the fault condition is removed. |
| E01 1520 11 2 | – | – | 11 | 2 | Header lower valve driver detects an open, short, overvoltage, or over-temperature condition. The Header Control Unit will not actuate the Header Lower Valve until the fault condition is removed. |
| E01 1521 11 2 | – | – | 11 | 2 | Tilt left valve driver detects an open, short, overvoltage, or over-temperature condition. The Header Control Unit will not actuate the HEADERTRAK Tilt Left Valve until the fault condition is removed. |
| E00 1565 09 3 | Armrest Control Unit | – | 9 | 3 | CAN Bus message missing from Armrest Control Unit – Header and Separator Engaged. |
| E01 1522 11 2 | Header Control Unit | – | 11 | 2 | Tilt right valve driver detects an open, short, overvoltage, or over-temperature condition. The Header Control Unit will not actuate the HEADERTRAK Tilt Right Valve until the fault condition is removed. |
| E01 1524 11 3 | – | – | 11 | 3 | Reel forward valve driver detects an open, short, overvoltage, or over-temperature condition. The Header Control Unit will not actuate the Reel Forward Valve until the fault condition is removed. |
| E01 1525 11 3 | – | – | 11 | 3 | Reel Aft valve driver detects an open, short, overvoltage, or over-temperature condition. The Header Control Unit will not actuate the Reel Aft Valve until the fault condition is removed. |
| E01 1526 11 3 | – | – | 11 | 3 | Reel Raise valve driver detects an open, short, overvoltage, or over-temperature condition. The Header Control Unit will not actuate the Reel Raise Valve until the fault condition is removed. |
| E01 1527 11 3 | – | – | 11 | 3 | Reel Lower valve driver detects an open, short, overvoltage, or over-temperature condition. The Header Control Unit will not actuate the Reel Lower Valve until the fault condition is removed. |
| E01 1528 11 3 | – | – | 11 | 3 | Drop Rate valve driver detects an open, short, overvoltage, or over-temperature condition. The Header Control Unit will not actuate the Drop Rate Valve until the fault condition is removed. |
| E01 1529 11 3 | – | – | 11 | 3 | Accumulator Shutoff valve driver detects an open, short, overvoltage, or over-temperature condition. The Header Control Unit will not actuate the Accumulator Shutoff Valve until the fault condition is removed. |
| E01 1531 06 2 | – | – | 6 | 2 | Reel Speed Increase driver detects an open, short, overvoltage, or over-temperature condition. The Header Control Unit will not actuate the Reel Speed Actuator in the increase speed mode until the fault condition is removed. |
| E01 1532 06 2 | – | – | 6 | 2 | Reel Speed Decrease driver detects an open, short, overvoltage, or over-temperature condition. The Header Control Unit will not actuate the Reel Speed Actuator in the decrease speed mode until the fault condition is removed. |
| E01 1533 03 2 | HEADERTRAK | 828 | 3 | 2 | HEADERTRAK – Return to Cut Sensor (cc# 828) voltage is too high, exceeding 4.5 V DC. Faulty device or wiring. |
| E01 1533 04 2 | – | 828 | 4 | 2 | HEADERTRAK – Return to Cut Sensor (cc# 828) voltage is too low, less than 0.5 V DC. Faulty device or wiring. |
| E01 1534 03 2 | Left HEADERTRAK Sensor | 412 | 3 | 2 | Left HEADERTRAK Sensor (cc# 412) voltage is too high, exceeding 4.5 V DC. Faulty device or wiring. |
| E01 1534 04 2 | – | 412 | 4 | 2 | Left HEADERTRAK Sensor (cc# 412) voltage is too low, less than 0.5 V DC. Faulty device or wiring. |
| E01 1535 03 2 | Right HEADERTRAK Sensor | 454 | 3 | 2 | Right HEADERTRAK Sensor (cc# 454) voltage is too high, exceeding 4.5 V DC. Faulty device or wiring. |
| E01 1535 04 2 | – | 454 | 4 | 2 | Right HEADERTRAK Sensor (cc# 454) voltage is too low, less than 0.5 V DC. Faulty device or wiring. |
| E01 1536 03 2 | Center HEADERTRAK Sensor | 414 | 3 | 2 | Center HEADERTRAK Sensor (cc# 414) voltage is too high, exceeding 4.5 V DC. Faulty device or wiring. |
| E01 1536 04 2 | – | 414 | 4 | 2 | Center HEADERTRAK Sensor (cc# 414) voltage is too low, less than 0.5 V DC. Faulty device or wiring. |
| E01 1537 03 3 | Reel Fore/Aft Position Sensor | 834 | 3 | 3 | Voltage too high – greater than 4.5 V DC. Faulty device or wiring. |
| E01 1537 04 3 | Reel Fore/Aft Position Sensor | 834 | 4 | 3 | Voltage too low – less than 0.5 V DC. Faulty device or wiring. |
| E01 1538 03 3 | Reel Height Sensor | 835 | 3 | 3 | Voltage too high – greater than 4.5 V DC. Faulty device or wiring. |
| E01 1538 04 3 | Reel Height Sensor | 835 | 4 | 3 | Voltage too low – less than 0.5 V DC. Faulty device or wiring. |
| E01 1539 03 3 | HEADERTRAK Angle Sensor | 833 | 3 | 3 | Voltage too high – greater than 4.5 V DC. Faulty device or wiring. |
| E01 1539 04 3 | HEADERTRAK Angle Sensor | 833 | 4 | 3 | Voltage too low – less than 0.5 V DC. Faulty device or wiring. |
| E01 1541 02 2 | Reel speed unknown | – | 2 | 2 | – |
| E01 1544 09 3 | Armrest Control Unit | – | 9 | 3 | CAN Bus message missing – Multifunction Lever Switch Status. |
E02: Right Control Unit Diagnostic Trouble Codes
| FAULT_CODES | Control Unit | SPN | FMI | Priority | Description |
|---|---|---|---|---|---|
| E02 96 03 3 | Fuel Level Signal | 652 | 3 | 3 | The voltage of the Fuel Level Signal (cc# 652) is too high, exceeding 1.96 V DC. The issue may be caused by faulty device or wiring. |
| E02 96 04 3 | Fuel Level Signal | 652 | 4 | 3 | The voltage of the Fuel Level Signal (cc# 652) is too low, less than 0.12 V DC. The issue may be caused by faulty device or wiring. |
| E02 627 03 1 | Electronic Power | 21 | 3 | 1 | The voltage of the Electronic Power (cc# 021) is too high, exceeding 16 V DC. |
| E02 628 12 1 | Controller | – | 12 | 1 | The controller cannot exit the boot block program. Turn Key Switch to the OFF position. Wait for 30 seconds. If the condition persists, replace the Right Control Unit. |
| E02 630 11 2 | – | – | 11 | 2 | The EEPROM failed the test during power-up. If the condition persists, replace the Right Control Unit. |
| E02 639 09 3 | Right Control Unit | – | 9 | 3 | The Right Control Unit is not receiving CAN Bus messages in a timely manner. This may result in none, slow response, or machine down situations. Other Diagnostic Trouble Codes will indicate the lost message. |
| E02 639 19 2 | – | – | 19 | 2 | CAN Bus messages are not being transmitted or received correctly. This may cause none, slow response, or machine down situations. |
| E02 1498 09 3 | Armrest Control Unit | – | 9 | 3 | The Armrest Control Unit is missing a CAN Bus message related to Header Engage Status. |
| E02 1500 09 3 | Cornerpost Control Unit | – | 9 | 3 | The Cornerpost Control Unit is missing a CAN Bus message related to Machine Configuration. |
| E02 1500 11 3 | Cornerpost Control Unit | – | 11 | 3 | The Cornerpost Control Unit has received an invalid CAN Bus message related to Machine Configuration. |
| E02 1508 03 2 | Hydraulic Oil Temperature Sensor | 775 | 3 | 2 | The voltage of the Hydraulic Oil Temperature Sensor (cc# 775) is too high, exceeding 4.97 V DC. This may be due to faulty device or wiring. |
| E02 1508 04 2 | Hydraulic Oil Temperature Sensor | 775 | 4 | 2 | The voltage of the Hydraulic Oil Temperature Sensor (cc# 775) is too low, less than 0.29 V DC. This may be due to faulty device or wiring. |
| E02 1509 03 2 | Main Gearcase Oil Temperature Sensor | 774 | 3 | 2 | The voltage of the Main Gearcase Oil Temperature Sensor (cc# 774) is too high, exceeding 4.97 V DC. This may be due to faulty device or wiring. |
| E02 1509 04 2 | Main Gearcase Oil Temperature Sensor | 774 | 4 | 2 | The voltage of the Main Gearcase Oil Temperature Sensor (cc# 774) is too low, less than 0.29 V DC. This may be due to faulty device or wiring. |
| E02 1510 03 3 | Chopper Vane Angle Sensor | 781 | 3 | 3 | The voltage of the Chopper Vane Angle Sensor (cc# 781) is too high, above 4.97 V DC. This may be due to faulty device or wiring. |
| E02 1510 13 3 | Chopper Vane Angle Sensor | 781 | 13 | 3 | The Chopper Vane Angle Sensor is out of calibration. It is recommended to perform the calibration procedure. |
| E02 1565 09 3 | Armrest Control Unit | – | 9 | 3 | The Armrest Control Unit is missing a CAN Bus message related to Discrete Input Status. |
E03: Left Control Unit Diagnostic Trouble Codes
| FAULT_CODES | Control Unit | SPN | FMI | Priority | Description |
|---|---|---|---|---|---|
| E03 190 09 3 | Engine Control Unit | – | 9 | 3 | CAN Bus message(s) related to Engine Speed are missing from the Engine Control Unit. |
| E03 627 03 1 | – | 21 | 3 | 1 | The voltage of the Electronic Power (cc# 021) is too high, exceeding 15.5 V DC. |
| E03 628 12 1 | – | – | 12 | 1 | The controller cannot exit the boot block program. It is advised to disconnect the Left Control Unit connector X213, reconnect the connector, and replace the Left Control Unit if the condition persists. |
| E03 630 11 3 | – | – | 11 | 3 | The EEPROM failed the test during power-up. Replace the Left Control Unit if the condition persists. |
| E03 639 19 3 | – | – | 19 | 3 | The CAN Bus messages are not being transmitted or received correctly. Possible effects are none, slow response, or machine down. |
| E03 876 11 2 | – | – | 11 | 2 | The CLIMATRAK Compressor driver detects an open, short, overvoltage, or overtemperature condition. |
| E03 1497 11 3 | – | – | 11 | 3 | The Unloading Auger Engage driver detects an open, short, overvoltage, or overtemperature condition. The Left Control Unit cannot engage the auger until the fault condition is removed. |
| E03 1500 09 3 | Cornerpost Control Unit | – | 9 | 3 | CAN Bus message(s) related to Ground Speed and/or Machine Configuration are missing from the Cornerpost Control Unit. |
| E03 1503 09 3 | Armrest Control Unit | – | 9 | 3 | CAN Bus message(s) are missing from the Armrest Control Unit. |
| E03 1515 09 3 | Header Control Unit | – | 9 | 3 | CAN Bus message(s) are missing from the Header Control Unit. |
| E03 200112 03 2 | – | 16 | 3 | 2 | 12 V DC is detected at the output of the Grain Tank Cover Fold relay (K7) of the Control Relay Board when it is not energized. Indicates a possible problem with K7 or Control Power (cc# 016) short circuit to 12 V DC. |
| E03 200112 04 2 | – | 16 | 4 | 2 | 12 V DC is not detected at the output of the Grain Tank Cover Fold relay (K7) of the Control Relay Board when it is energized. Indicates a possible problem with K7 or Control Power (cc# 016). |
| E03 200126 11 3 | – | – | 11 | 3 | The Unloading Auger Swing In driver or the Unloading Auger Swing Out driver detects an open, short, overvoltage, or overtemperature condition. The Left Control Unit cannot swing the auger until the fault condition is removed. |
| E03 200128 03 1 | – | 447 | 3 | 1 | HILLMASTER II Engage is not ON, but 12 V DC is detected on the Hillmaster Engage Signal (cc# 447) of the Left Control Unit. Possible problem with the Left Control Unit or Hillmaster Engage Signal (cc# 447) shorted to 12 V DC. |
| E03 200128 04 1 | – | 447 | 4 | 1 | Hillmaster Engage Signal (cc# 447) is not 12 V DC when ON. Possible problem with the Left Control Unit or Hillmaster Engage Signal (cc# 447) wiring. When HILLMASTER II is disengaged, the Diagnostic Trouble Code becomes a stored code. |
| E03 200129 11 3 | – | – | 11 | 3 | The Combine Lower driver detects an open, short, overvoltage, or overtemperature condition. The Left Control Unit cannot engage Combine Lower until the fault condition is removed. |
| E03 200132 11 1 | – | – | 11 | 1 | The Left Brake Light driver detects an open, short, overvoltage, or overtemperature condition. Only active in the ROAD mode. |
| E03 200133 11 1 | – | – | 11 | 1 | The Right Brake Light driver detects an open, short, overvoltage, or overtemperature condition. Only active in the ROAD mode. |
| E03 200134 11 1 | – | – | 11 | 1 | The Left Marker Light driver detects an open, short, overvoltage, or overtemperature condition. Only active in the ROAD mode. |
| E03 200135 11 1 | – | – | 11 | 1 | The Right Marker Light driver detects an open, short, overvoltage, or overtemperature condition. Only active in the ROAD mode. |
| E03 200137 11 2 | – | – | 11 | 2 | The Feeder House Reverser driver detects an open, short, overvoltage, or overtemperature condition. |
| E03 200140 03 2 | – | 10 | 3 | 2 | 12 V DC detected on Ground (cc# 010) of the Control Relay Board. Indicates a problem with ground connections. |
| E03 200141 04 2 | – | 22 | 4 | 2 | 12 V DC not detected on Unswitched Electronic Power (cc# 022) of the Control Relay Board. Indicates a problem with Unswitched Electronic Power connection, wiring, or Fuse F20 of the Engine Compartment Relay Panel. |
| E03 200142 04 2 | – | 14 | 4 | 2 | 12 V DC not detected on Light Power (cc# 014) of the Control Relay Board. Indicates a problem with Light Power connection, wiring, or Fuse F18 of the Engine Compartment Relay Panel. |
| E03 200143 04 2 | – | 16 | 4 | 2 | The Control Power (cc# 016) voltage of the Control Relay Board is not detected as 12 V DC. This indicates a potential problem with the Control Power connection, wiring, Fuse F8, or Relay K4 of the Engine Compartment Relay Panel. |
| E03 200144 04 2 | – | 46 | 4 | 2 | The Light Power 2 (cc# 046) voltage of the Control Relay Board is not detected as 12 V DC. This suggests a potential issue with the Light Power 2 connection, wiring, or Fuse F5 of the Engine Compartment Relay Panel. |
| E03 200145 04 2 | – | 47 | 4 | 2 | The Light Power 3 (cc# 047) voltage of the Control Relay Board is not detected as 12 V DC. This points to a possible problem with the Light Power 3 connection, wiring, or Fuse F3 of the Engine Compartment Relay Panel. |
| E03 200146 04 3 | – | 48 | 4 | 3 | The Light Power 4 (cc# 048) voltage of the Control Relay Board is not detected as 12 V DC. This indicates a potential issue with the Light Power 4 connection, wiring, or Fuse F4 of the Engine Compartment Relay Panel. |
| E03 200147 04 2 | – | 51 | 4 | 2 | The Fan Speed Adjust Power (cc# 051) voltage of the Control Relay Board is not detected as 12 V DC. This suggests a potential problem with the Fan Speed Adjust Power connection, wiring, Fuse F11, or Relay K5 of the Engine Compartment Relay Panel. |
| E03 200148 04 2 | – | 49 | 4 | 2 | The Light Power 5 (cc# 049) voltage of the Control Relay Board is not detected as 12 V DC. This indicates a possible problem with the Light Power 5 connection, wiring, or Fuse F9 of the Engine Compartment Relay Panel. |
| E03 200149 11 2 | – | – | 11 | 2 | This fault code suggests a problem in the serial communication link between the Left Control Unit and the Control Relay Board. |
John Deere ECU Fault Codes and Solutions
Absolutely! Here’s the information presented as a clear and concise data table for 2025.
| Fault Code | Description | Possible Cause | Solution |
|---|---|---|---|
| ECU 000097.03 | Indicates water in the fuel. | Presence of water in the fuel | Drain the fuel system to remove water and prevent engine issues. |
| ECU 000097.04 | The engine water trap is full and needs to take out the water from it. | Accumulated water in the engine water trap | Drain the water trap to maintain proper fuel flow and engine performance. |
| ECU 000100.01 | The oil pressure is pretty low and indicates checking the level of engine oil. | Low engine oil pressure | Check engine oil level and add oil if necessary. Address oil system issues for proper pressure. |
| ECU 000100.03 | Engine pressure input and high voltage. | High voltage input related to engine pressure | Inspect engine pressure sensor circuit and repair high voltage input issues. |
| ECU 000100.04 | Issue of the voltage signal in the oil pressure. | Voltage signal problem related to oil pressure | Troubleshoot oil pressure sensor circuit and resolve voltage signal issues. |
| ECU 000100.18 | Limited engine power and oil pressure. | Low oil pressure causing power limitation | Check engine oil level, inspect for leaks or blockages, and address issues to restore power. |
| ECU 000100.31 | When the motor turns off, the sensor indicates oil pressure. | Post-engine shutdown oil pressure reading | Check sensor and circuit for accurate readings and address anomalies for proper indication. |
| ECU 000102.02 | Trouble with the sensor of manifold air pressure. | Manifold air pressure sensor problem | Inspect sensor and circuit, replace if needed. |
| ECU 000102.03 | Fault with the sensor of intake manifold pressure. | Intake manifold pressure sensor issue | Check sensor and circuit, replace if required. |
| ECU 000102.04 | Error with the signal of manifold air pressure voltage. | Voltage signal problem related to air pressure | Inspect voltage signal, address any issues affecting accurate readings. |
| ECU 000103.00 | More speed while engine power is limited. Need to cut down the load and engine speed. | High engine speed despite power limitation | Reduce load and lower RPM to prevent engine strain. |
| ECU 000103.05 | The sensor of turbocharging speed is reduced. | Reduced turbocharging speed | Inspect turbocharging system and sensor, address issues affecting speed reading. |
| ECU 000103.06 | Turbocharge speed power is lifted. | Increased turbocharger speed power | Inspect turbocharger system, adjust power for proper operation. |
| ECU 000103.08 | Turbocharger speed is not valid. | Invalid turbocharger speed reading | Check turbocharger system, sensor, and circuit for valid speed readings. |
| ECU 000103.31 | Missing turbocharger speed. | No turbocharger speed information received | Inspect turbocharger speed sensor and circuit to restore proper data transmission. |
| ECU 000105.00 | High intake air temperature. | Abnormally high intake air temperature | Inspect intake air system for issues and address problems causing high temperature. |
| ECU 000105.04 | Trouble with the temperature signal. | Temperature signal problem | Inspect temperature sensor circuit and address signal issues affecting accurate readings. |
| ECU 000105.15 | Indicates the cooling system or radiator contains dust. | Dust in the cooling system or radiator | Clean the cooling system and radiator to ensure proper cooling efficiency. |
| ECU 000105.16 | The air temperature of the manifold is drastically high. | Extremely high air temperature in the manifold | Inspect intake manifold and sensor, address high temperature reading problems. |
| ECU 000108.02 | Invalid sensor of barometric pressure. | Invalid barometric pressure sensor reading | Inspect sensor and circuit, replace if necessary. |
| ECU 000110.00 | The engine coolant temperature is high. | High engine coolant temperature | Check engine coolant level, inspect cooling system, address overheating problems. |
| ECU 000110.03 | Inaccessible signal of engine coolant temperature. | Unavailable engine coolant temperature signal | Inspect coolant temperature sensor circuit, address accessibility issues. |
| ECU 000110.04 | Low voltage input of engine coolant temperature. | Low voltage input from coolant temperature sensor | Check |
How to Retrieve John Deere Engine Codes?
Want to check John Deere engine fault codes yourself? Here’s how to do it from the comfort of your home:
John Deere BCU Fault Codes and Solutions
| Fault Code | Description | Solution |
|---|---|---|
| BCU 000070.31 | Problem with the handbrake. | Troubleshoot the handbrake to identify the specific issue and then fix it accordingly. |
| BCU 000084.02 | (Wheel Speed Sender) Issue with the circuit. | Carefully inspect the circuit to find the problem and replace any damaged parts as needed. |
| BCU 000168.16 | Voltage system is too high when the engine is running. | Check the voltage regulator and replace it if necessary to regulate the voltage correctly. |
| BCU 000168.17 | Voltage system is too low around 1,500 RPM engine speed. | Reduce the engine RPM below 1,500 and then adjust the voltage as needed for smooth operation. |
| BCU 000168.18 | Voltage system is too low above 1,500 RPM engine speed. | Reduce the engine RPM below 1,500 and then adjust the voltage accordingly to maintain proper operation. |
| BCU 000186.02 | (Rear PTO Speed Sender) Problem with the electrical circuit. | Check the PTO circuit and, if necessary, replace the clutch to make sure it functions properly. |
| BCU 000186.17 | Rear PTO speed not being registered. | Seek assistance from a technician to accurately adjust the rear PTO speed. |
| BCU 000190.02 | (Engine Speed Sender) Circuit fault. | Inspect the circuit for any issues and repair or replace as needed. |
| BCU 000629.12 | (Control Unit) Internal issue with the control unit. | Seek professional help to diagnose and address the internal issue with the control unit. |
| BCU 000639.12 | (Control Unit) Internal system error in the control unit. | Consult a qualified technician to identify and resolve the internal system error. |
| BCU 000639.13 | (29-bit CAN BUS) High error rate in the 29-bit CAN BUS. | Investigate the CAN BUS system to find the cause of the high error rate and address it accordingly. |
| BCU 000639.14 | (29-bit CAN BUS) Higher error rate in the 29-bit CAN BUS. | Carefully examine the CAN BUS system to determine the source of the higher error rate and fix the issue. |
| BCU 000746.31 | Circuit issue with the differential lock solenoid valve. | Replace the solenoid coil and armatures, if required, to resolve the circuit problem. |
| BCU 000980.07 | Switch issue of rear PTO. | Inspect the rear PTO switch for any issues and replace it if needed. |
| BCU 001676.31 | Circuit error of the relay for LTC coolant pump. | Inspect the closed circuit and replace the faulty relay to ensure proper coolant pump operation. |
| BCU 001882.02 | (Front PTO speed sender) Issue with the electrical circuit for front PTO speed. | Check the electrical circuit for the front PTO speed sender and fix any problems found. |
| BCU 299780.07 | Turn-signal switch fault. | Repair or replace the turn-signal switch if it is malfunctioning. |
| BCU 302001.31 | (Information For Operator) 250 hours of service information. | The BCU is providing information to the operator about 250 hours of service. |
| BCU 302002.31 | (Information For Operator) 500 hours of service information. | The BCU is providing information to the operator about 500 hours of service. |
| BCU 302003.31 | (Information For Operator) 750 hours of service information. | The BCU is providing information to the operator about 750 hours of service. |
| BCU 302004.31 | (Information For Operator) 1,500 hours of service information. | The BCU is providing information to the operator about 1,500 hours of service. |
| BCU 302071.31 | (Information For Operator) Issue with rear PTO switch which needs to turn off. | The BCU is notifying the operator to turn off the rear PTO switch. |
| BCU 302073.31 | Trouble with the circuit of the rear PTO solenoid valve. | Inspect the circuit of the rear PTO solenoid valve and fix any circuit-related problems. |
John Deere ACU Fault Codes List and Solutions
| Fault Code | Description | Possible Cause | Solution |
|---|---|---|---|
| ACU 000158.04 | (Rear PTO System) Low voltage of ACU. | Faulty electrical supply | Inspect connections and fix voltage issue. |
| ACU 000177.17 | (Transmission Oil Temperature Low) The oil is cold which limits engine speed. | Cold transmission oil | Allow equipment to warm up for higher speed. |
| ACU 000581.07 | (Transmission System) Transmission not reacting. | Malfunction in transmission system | Consult technician for diagnosis and repairs. |
| ACU 000974.02/ ACU000974.03 | (Operator Controls) Issue with hand throttle circuit voltage. | Faulty sensor or voltage disruption | Inspect and replace faulty parts or repair circuit. |
| ACU 002000.09 | (Communication System) Not showing ECU message or fuse F24 needs attention. | Communication breakdown or blown fuse F24 | Troubleshoot communication and replace fuse F24 if needed. |
| ACU 002003.09 | (Communication System) Not showing PTP/PTI message. | Communication issue with PTO/PTI systems | Diagnose and fix communication problem for message display. |
| ACU 002020.09 | (Communication System) Missing SFA message. | Communication breakdown with SFA system | Examine communication system and restore SFA message display. |
| ACU 002049.09 | (Communication System) Missing CAB message or fuse F22 needs attention. | Communication issue with CAB system | Troubleshoot communication and replace fuse F22 if necessary. |
| ACU 523775.02 | (Single Lever Control) Trouble with hand presence switch. | Faulty or malfunctioning hand presence switch | Inspect switch for issues and replace if required. |
| ACU 523805.03 | (Single Lever Control) Issue in single lever control. | Malfunction within Single Lever Control | Consult technician for diagnosis and repair of Single Lever Control system. |
| ACU 523955.31 | (Transmission System) High engine load when in manual mode. | Problem within the transmission system | Have transmission system inspected and repaired by a technician. |
| ACU 523960.17 | (Operator Not In Seat) No operator at low speed. | Operator not seated at low speed | Ensure operator is seated before low-speed operation to prevent interlock activation. |
| ACU 523960.31 | (Operator Not In Seat) Sensor issue or operator not seated. | Faulty seat sensor or improper seating | Inspect seat sensor and wiring for issues and address improper seating if necessary. |
| ACU 523961.02 | (Transmission System) Gear switches to Park while in gear. | Transmission issue | Have transmission inspected and repaired to resolve gear switching problem. |
| ACU 523961.07 | (Transmission Not In Park) Issue with park lock engagement. | Park lock not engaging properly | Investigate park lock engagement and address the issue for correct functionality. |
| ACU 523962.31 | (MFWD System) Invalid MFWD speed. | Problem with MFWD speed measurement | Check MFWD speed measurement system and resolve the issue for valid speed readings. |
| ACU 523966.31 | (Transmission System) Transmission comes to home mode. | Transmission issue | Consult technician to diagnose and repair transmission for proper mode operation. |
| ACU 523923.02/ ACU 523923.03/ ACU 523923.04 | (Operator Controls) Issue with sensor or SCV I control level switch. | Faulty sensor or control level switch | Inspect and troubleshoot sensor and switch issues, replace if needed for proper function. |
John Deere TCU Fault Codes List and Solutions
| Fault Code | Description | Possible Cause | Solution |
|---|---|---|---|
| TCU 304020.02 | Issue with the transmission enable signal. | Disruption in transmission enable signal | Inspect transmission enable signal circuit for issues and fix any disruptions. |
| TCU 304019.05 | The clutch pedal sensor not working. | Faulty clutch pedal sensor | Check clutch pedal sensor, and if faulty, replace it for proper functionality. |
| TCU 304050.04 | (Hydrostatic Speed Sender) Channel 1 ground circuit. | Compromised ground circuit | Inspect Hydrostatic Speed Sender’s channel 1 ground circuit and address any disruptions. |
| TCU 304024.04 | (Transmission Oil Temperature Sender) Electrical short to ground. | Electrical short to ground | Investigate Transmission Oil Temperature Sender circuit for shorts and resolve the issue. |
| TCU 304032.03 | (Clutch Pedal Switch) Electrical shorted circuit. | Electrical short in Clutch Pedal Switch | Check Clutch Pedal Switch circuit for short circuits and fix to restore normal operation. |
| TCU 304057.03 | (Transmission Output Speed Sender) At channel 1, circuit issue. | Shorted or open circuit in channel 1 | Inspect Transmission Output Speed Sender’s channel 1 circuit for shorts or open connections. |
| TCU 304033.03 | (Transmission Enable Signal) Issue with circuit (shorted). | Short circuit in Transmission Enable Signal circuit | Check Transmission Enable Signal circuit for shorts and resolve to enable the transmission. |
| TCU 304040.03 | (Transmission Oil Temperature Sender) The circuit is open or shorted. | Open or short circuit in Transmission Oil Temperature Sender | Examine Transmission Oil Temperature Sender circuit for open or short connections. Fix issues. |
John Deere Fault Codes By Model
John Deere 6330 Fault Codes: Possible Causes and Solutions
The John Deere 6330 tractor is a high-performance machine with advanced features. Its control units are sophisticated, capable of identifying approximately 70 unique error codes. Below are a few examples of these diagnostic codes.
| Fault code | Description | Possible Cause | Solution |
|---|---|---|---|
| 02 | Forward pedal voltage signal not calibrated and out-of-range | Low fuel level or improper fuel mixture | Add fresh fuel and use a fuel stabilizer to adjust oil flow |
| 08 | Throttle sensor causing reduced engine performance | Severely clogged fuel filter | Clean or replace the fuel filter and ensure sufficient coolant in the radiator |
| 07 | Cruise Set/Decel switch held or stuck | Faulty Cruise Set/Decel switch or electrical issue | Inspect battery, check terminals and wiring |
| 200 | Primary throttle shorted to a high voltage source | Corroded or damaged battery terminals or wiring | Check battery terminals and wiring, clean radiator fins |
| 201 | Fuel pressure sensor output voltage higher than normal | Debris in mower deck, worn-out blades, dirty engine fuel filter | Clear debris from mower deck, replace blades, inspect fuel filter |
| 205 | Problem with engine fuel temperature, higher voltage than usual | Hydraulic motor not connected to 300 Series SCV with a compensator valve | Connect hydraulic motor to 300 Series SCV with compensator valve to regulate pressure |
John Deere 333E Fault Codes: Possible Causes and Solutions
The JD 333E exhibits various fault codes, primarily related to speed sensor issues. Consult the table below for a comprehensive list of these codes, detailed explanations, and effective troubleshooting steps. This information is updated for 2025.
| Fault code | Possible Cause | Solution |
|---|---|---|
| 1594.02 | Short or open circuit in the left speed sensor wiring. | Inspect the circuit and check for any faulty sensor wirings. |
| Faulty left speed sensor wirings. | Replace the faulty wirings, if any. | |
| 1595.02 | Bad calibration of the right speed sensor. | Re-calibrate the right speed sensor. |
| Faulty right speed sensor wiring. | Check the sensor wiring for defects and replace if necessary. |
Diagnosing John Deere Fault Codes
Enter the diagnostic session by holding the roll mode switch for five seconds. In diagnostics mode, active and past fault codes appear on the screen. Each code shows a 3-letter control unit abbreviation, plus a code number like XXXXXXX.XX.
How to Reset the Codes on a John Deere?
Clearing error codes on John Deere tractors and equipment differs based on the specific model. Some require activating the hazard lights or disconnecting the solenoid. You can also use an OBD-II scanner to erase the fault codes. This information is updated for 2025.
Clearing fault codes without fixing the root problem might lead to their return. For accurate diagnosis and reset, consult a John Deere specialist or your local service center. This ensures the issue is properly resolved.
To clear diagnostic trouble codes on your John Deere skid steer in 2025, use this updated procedure:
How to Clear the Codes on a John Deere Skid Steer?
Need to clear error codes on your John Deere Skid Steer? Here’s how to do it:
What Should I Do If I Receive Fault Codes Again?
Seeing those fault codes reappear after clearing them? That means the initial problem persists. Perhaps the previous fix wasn’t quite right or didn’t completely solve the underlying issue.
Certain diagnostic codes point to easily resolved issues needing basic troubleshooting. However, others demand deeper analysis and a skilled technician’s expertise.
Always consult the service manual for troubleshooting tips and solutions. For intricate or serious issues, a qualified expert is your best bet. They possess the expertise to accurately diagnose and fix the problem, preventing future fault code recurrences.
Wrap Up
Thanks for waiting! We’ve now addressed all key error codes for ECU, BCU, ACU, and TCU systems in John Deere tractors. This information is current as of 2025.
For DIY fault code repairs, always prioritize the manufacturer’s guidelines. Adhering to their recommendations ensures a safer and more effective troubleshooting process.
Having trouble fixing it yourself? Visit your local John Deere service center. Alternatively, get help from a certified John Deere technician. They possess the knowledge to accurately diagnose and resolve any problems you’re facing.
I’m excited to share more details in my upcoming article. Until then, stay safe and enjoy working with your John Deere tractor!
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