John Deere is an American-based company that is popular around the globe for its heavy machinery generally for agriculture and construction purposes. Another reason for their popularity is the use of advanced electronic control units in their machinery. This machinery sometimes shows errors, but don’t worry, the John Deere fault codes list proves very helpful in this situation. The John Deere codes list contains all the essential explanations of faults that cause trouble.
It becomes hard sometimes when you want to find the solution to your problems that may seem unsolvable. However, we are here to help you out of this misery and set a valuable guide for you with the fault code list that can help you in this scenario. So keep reading!
How to Find the Fault Codes for a John Deere Engine
You may deal with various issues related to your John Deere, but there is no need to worry about these intractable issues because the John Deere fault codes list is beneficial for resolving them. But sometimes, it looks challenging to switch back due to some unexpected problems. So we are here with the research to provide the proper answer to your issue.
You will find the trouble codes based on the different units below, so let’s get into the John Deere fault codes list:
John Deere ECU Codes List
The Engine Control Unit or ECU that is present on John Deere machinery helps in troubleshooting the problems related to the electrical system of your vehicle. In short, an ECU is basically a sensor that will show the fault codes related to various electric issues of the vehicle. Mechanics and technicians mostly use these ECU code descriptions to solve the issues you may face with the John Deere machines.
Although these engines are excellent, you may need to use these John Deere ECU codes. ECU is a system in John Deere that converts the fuel into power when you use the machine and also a symbol when you malfunction. This computer unit scans the codes automatically and provides information about the problem of the John Deere vehicle.
| Code | Information |
| ECU 000097.03 | It indicates the presence of water in the fuel. |
| ECU 000097.04 | This code means the water trap of the engine is complete, and there is a need to take out the water from it. |
| ECU 000100.01 | It means the pressure is low so you need to check the engine’s oil level. |
| ECU 000100.03 | It shows the input pressure and high voltage of the engine. |
| ECU 000100.04 | An indication of a problem due to the voltage signal pressure in the oil. |
| ECU 000100.18 | There is a little oil pressure and power of the engine. |
| ECU 000100.31 | The sensor will indicate the oil pressure when the motor turns off. |
| ECU 000102.02 | It indicates the issue with the manifold air pressure sensor. |
| ECU 000102.03 | This shows a problem with the intake manifold pressure sensor. |
| ECU 000102.04 | There is an error with the voltage of manifold air pressure. |
| ECU 000103.00 | The indication of the high speed when the engine’s power is limited. So cut down the speed of the engine and its load. |
| ECU 000103.05 | It shows that the turbocharging speed has become low. |
| ECU 000103.06 | An indication for the speed power of Turbocharge is lifted. |
| ECU 000103.08 | This shows that the speed of turbocharging may not be valid. |
| ECU 000103.31 | There is a missing turbocharging speed. |
| ECU 000105.00 | It means the intake air temperature is very high. |
| ECU 000105.04 | A problem with the signals of temperature. |
| ECU 000105.15 | It shows that there is an issue with the cooling system or may be dust in the radiator. |
| ECU 000105.16 | This indicates that the air temperature of the manifold is very high. |
| ECU 000108.02 | This means that the barometric pressure sensor is invalid. |
| ECU 000110.00 | An indication of the high temperature of the engine coolant. |
| ECU 000110.03 | It shows that the signals are inaccessible from the engine coolant temperature. |
| ECU 000110.04 | The code indicates that the input voltage is low for the engine coolant temperature. |
| ECU 000110.15 | It means that there is a little increase in the engine coolant temperature. |
| ECU 000110.16 | The coolant temperature is high, and there is a need to cool it down. |
| ECU 000110.17 | The coolant temperature is low and you need to warm it up. |
| ECU 000157.04 | There is a fault in the input voltage of the fuel line pressure sensor. |
| ECU 000157.10 | The pressure of the fuel line may drop. |
| ECU 000157.17 | It shows the pressure of the fuel line doesn’t rise. |
| ECU 000158.17 | Indication of problems occurs while taking out the power to the ECU. |
| ECU 000174.00 | The rating of fuel temperature is high. |
| ECU 000174.03 | This shows sensor of fuel temperature is inaccessible. |
| ECU 000174.04 | There is an error in the fuel temperature voltage input signals. |
| ECU 000174.16 | It indicates that temperature may increase. |
| ECU 000189.00 | An indication that there is no data about engine speed derate. |
| ECU 000190.00 | The engine’s speed is high due to the low fuel and downshifting. |
| ECU 000237.31 | It provides information on Vehicle Number. |
| ECU 000237.02 | The information on VIN is not valid. |
| ECU 000611.03 | Badly shortage of injection. |
| ECU 000611.04 | Signaling the burning in the wiring of the electronic injection. |
| ECU 000627.01 | It shows a fault in the electronic injection system. |
| ECU 001347.07 | Just pay attention to the fuel filter and provide a rail for it. |
| ECU 001569.31 | It shows results are low in the power rating of engine derate. |
| ECU 001639.01 | Indication of decreased speed on the engine. |
| ECU 001639.16 | It means the high fan speed signal has an issue. |
| ECU 001639.18 | This means the fan speed is low. |
| ECU 002005.09 | There is an error in the signals of fan speed. |
| ECU 002790.16 | It signals that there is a fault when the temperature of the compressor outlet rises. |
Fault Codes List of John Deere Arm Control Unit (ACU)
These codes pop up when there is any issue related to the fault in the system. Let’s have a look at the codes mentioned below:
| Code Number | Information |
| ACU 000158.04 (Rear PTO System) | The voltage of the ACU is low. |
| ACU 000177.17 (Transmission Oil Temperature Low) | It means that the speed of the engine is low due to the cold oil. |
| ACU 000581.07 (Transmission System) | No reaction from the transmission. |
| ACU 000974.02/ ACU000974.03 (Operator Controls) | It indicates that there is an issue with the voltage of the hand throttle circuit. |
| ACU 002000.09 (Communication System) | The F24 fuse needs attention and does not show the messages of ECU. |
| ACU 002003.09 (Communication System) | It means no display of the messages of PTP/PT. |
| ACU 002020.09 (Communication System) | Missing SFA messages. |
| ACU 002049.09 (Communication System) | Fuse F22 is creating a problem or the CAB message is not available. |
| ACU 523775.02 | It indicates that there is trouble with the hand presence switch. |
| ACU 523805.03 | Problem with the single lever control issues. |
| ACU 523955.31 | The transmission system is in manual mood high engine load. |
| ACU 523960.17 | It shows there is no operator at low speed. |
| ACU 523960.31 | It means that the operator is not on the seat or issue with the sensor. |
| ACU 523961.02 (Transmission System) | The switches are into the gear to Park. |
| ACU 523961.07 | Transmission is not in the park or there is a fault in the park lock engagement. |
| ACU 523962.31 | MFWD system speed is invalid. |
| ACU 523966.31 | The transmission system is in home mode. |
| ACU 523923.02, ACU 523923.03, ACU 523923.04 | There is a problem with the sensor or SCV I control switch in the operator controls. |
John Deere Transmission Fault Codes List
The transmission control unit is a John Deere system that can control modern technology’s transmissions. Most of the issues or errors of machines may show from the TCU for an immediate fix. The list includes:
| Code Number | Information |
| TCU 304020.02 | A problem during the enabled transmission signals. |
| TCU 304019.05 | Obstruction in the sensor of the clutch pedal. |
| TCU 304050.04 | Channel one ground circuit of the hydrostatic speed sender |
| TCU 304024.04 | There is an electrical short to the ground transmission oil temperature sender. |
| TCU 304032.03 | The clutch pedal switch has an electric short in the circuit. |
| TCU 304057.03 | The circuit may short or open at channel 1in the transmission output speed sender. |
| TCU 304033.03 | There is a fault with the circuit in the transmission enable signal. |
| TCU 304040.03 | It indicates the circuit may be short or open in the transmission oil temperature sender. |
Fault Codes List of John Deere Basic Control Unit (BCU)
BCU acts as the main computer of the electronic control unit of the John Deere machinery which controls all functions. The codes included in this list are:
| Code Number | Information |
| BCU 000070.31 | An indication of an issue with the hand brake. |
| BCU 000084.02 (Wheel Speed Sender) | The fault is in the circuit. |
| BCU 000168.16 | Higher voltage during engine running. |
| BCU 000168.17 | The voltage system becomes too low at 1500 RMP. |
| BCU 000168.18 | The lower voltage at an increased speed of up to 1500 RPM. |
| BCU 000186.02 (Rear PTO Speed Sender) | There is a problem with the electrical circuit. |
| BCU 000186.17 | The rear PTO speed may not register. |
| BCU 000190.02 (Engine Speed Sender) | There is an issue in the circuit. |
| BCU 000629.12 (Control Unit) | It indicates an internal issue. |
| BCU 000639.12 (Control Unit) | An error in the internal system. |
| BCU 000639.13 (29-bit CAN BUS) | The faults are of high rate. |
| BCU 000639.14 (29-bit CAN BUS) | Higher error rate. |
| BCU 000746.31 | A possible circuit issue in the lock solenoid valve. |
| BCU 000980.07 | Rear PTO switch issue. |
| BCU 001676.31 | LTC coolant pump facing error in the relay. |
| BCU 001882.02 | A possible fault in the electric circuit of the front PTO speed sender. |
| BCU 299780.07 | There is an issue with the turn signal switch. |
| BCU 302001.31 (Information For Operator) | 250 service hours. |
| BCU 302002.31 (Information For Operator) | 500 service hours. |
| BCU 302003.31 (Information For Operator) | 750 service hours. |
| BCU 302004.31 (Information For Operator) | 1,500 service hours. |
| BCU 302071.31 (Information For Operator) | turn off the rear PTO switch due to fault. |
| BCU 302073.31 | It shows that there is an issue between the circuit and the rear PTO solenoid valve. |
Retrieving Engine Fault Codes
John Deere diagnostic code list helps your dealer for services, and you can also adhere to the following steps to take on the codes on your own:
1. It is essential to level the surface where you want to park your machine and ensure the ground is sturdy. The boom should withdraw entirely and level the machine.
2. Ensure that the parking brakes and the transmission control lever are in their natural positions whenever you park your machine.
3. Now, start the ignition and slowly reset the dashboard button. Hold this button for up to three to five seconds, and the fault lamp will display the code numbers of the errors you may face.
4. You can see that the first digit starts to flash the light when you follow the same process for the display of the second digit after a brief pause.
5. However, the 32 flash codes will come first when it comes to active codes. If there are no 88 codes when the defect code records are relevant, it may display code 33. but the system will display code 88 without any stored fault code.
6. The codes will be successfully retrieved when you switch off the ignition and restart it.
Final Thoughts
These are all the necessary lists of John Deere fault codes, and I hope they will benefit you. This list of fault codes may give you a relaxed feeling and make your journey on the road less challenging and daunting. We will provide you with a lot of information. But in the case of any disappointment according to the situation, you can get the help of a professional. Consult an expert because they have a reliable solution for your problems. So make decisions according to your situation.
FAQs
1. What Is the Way to Check the Codes on a John Deere?
It is straightforward to check the codes on a John Deere because there is a manual that contains all the codes. However, if something happened or you lost it accidentally, here is a brief review of what you should do. Once you press the button, codes start to appear. Now, you can troubleshoot the issue after finding the diagnostic code.
2. In What Ways the Fault Codes Work?
These fault codes hold the basic information about the errors that will be detected in your vehicle. However, the corresponding code will only appear whenever any issue may be detected by the system.
3. What Are the Fault Codes?
These diagnostic trouble codes are also known as engine fault codes. You can use five-digit codes to identify a specific problem or error in your vehicle.
4. How Do You Manually Check Engine Codes?
If you want to check the engine codes manually, flip your car’s ignition on and off several times. Ensure you can do it without cracking the engine and finish it with the key in position. After this, your vehicle will start to check for the saved trouble codes. The lights on the dashboard will light up until one remains on, and it is mostly the light of the service engine.