John Deere Fault Codes List | Everything You Need To Know (Complete)

Even the most well-engineered automobiles, farm equipment, and other such devices are occasionally released with mechanical or electrical problems that need to be quickly identified and fixed. If your John Deere is giving you a tough time, it may have a mechanical or electrical problem that needs to be addressed. This post lays out the John Deere Fault Codes List for those who are facing any such issues.

This article’s John Deere Fault Codes List could speed up troubleshooting. If your John Deere equipment is giving you trouble, the manufacturer provides a list of diagnostic fault codes to help you identify potential problems, and we have brought all of them under one roof.

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John Deere Fault Codes List | What is a Fault Code?

A fault code is a code that appears on a diagnostic device when the device reads that there is an issue with the vehicle’s engine, body, or electrical components. The information gathered from these devices helps repair shops troubleshoot problems and determine where the problem lies within the vehicle.

John Deere Fault Codes List

ECU 000097.03- Water in fuel (high) 

ECU 000097.04- Water in fuel (low) 

ECU 000097.16- Water in fuel 

ECU 000100.01- Low oil pressure  

ECU 000100.03- Oil pressure (high) 

ECU 000100.04- Oil pressure voltage low 

ECU 000100.18- Oil pressure   

ECU 000100.31- Engine oil pressure  

ECU 000102.02- Pressure mismatch  

ECU 000102.03- Manifold air pressure (high) 

ECU 000102.04- Manifold air pressure (low) 

ECU 000103.00- Turbocharger speed too high 

ECU 000103.02- Turbocharger speed mismatch  

ECU 000103.05- Open circuit in turbocharger  

ECU 000103.06- Short circuit in turbocharger  

ECU 000103.08- Incorrect speed of turbocharger 

ECU 000103.31- Turbocharger speed missing 

ECU 000105.00- Engine air temperature too high 

ECU 000105.03- Engine air temperature range high 

ECU 000105.04- Engine air temperature range low 

ECU 000105.15- Engine air temperature too high 

ECU 000105.16- Engine air temperature too high 

ECU 000107.00- Air filter restricted 

ECU 000108.02- Invalid Barometric pressure  

ECU 000110.00- Too high engine coolant temperature 

ECU 000110.03- High voltage of engine coolant temperature 

ECU 000110.04- Low voltage of engine coolant temperature 

ECU 000110.15- Engine air temperature too high 

ECU 000110.16- Engine air temperature too high  

ECU 000110.17- Engine air temperature too low 

ECU 000157.03- High voltage of fuel pressure 

ECU 000157.04- Low voltage of fuel pressure 

ECU 000157.10- Pressure drops too fast 

ECU 000157.16- Fuel Pressure is high 

ECU 000157.17- Pressure not increasing 

ECU 000157.18- Low fuel pressure 

ECU 000158.17- Error in engine system. Battery voltage low  

ECU 000174.00- High temperature of fuel 

ECU 000174.03- Temperature voltage sensor out of range (high) 

ECU 000174.04- Temperature voltage sensor out of range (low) 

ECU 000174.16- Fuel temperature too high 

ECU 000189.00- Engine speed decrease 

ECU 000412.00- Gas exhausted-high temperature 

ECU 000412.03- Exhausted temperature (high) 

ECU 000412.04- Exhausted temperature (low) 

ECU 000412.15- Gas exhausted-high temperature 

ECU 000412.16- Gas exhausted-high temperature 

ECU 000611.03- Short voltage in injector wiring  

ECU 000611.04- Short ground in injector wiring 

ECU 000627.01- Injector issue 

ECU 000627.18- Very low voltage 

ECU 000629.13- Error in ECU programming  

ECU 000636.02- Electrical noise from engine  

ECU 000641.12- Error in turbocharger and ECU unit 

ECU 000641.16- Too high turbocharger temperature  

ECU 000651.02- Invalid injector parts 

ECU 000656.05- Low injector current 

ECU 000656.06- Injector current too fast 

ECU 001136.00- Control unit temperature too high 

ECU 001180.00- Inlet temperature of turbocharger is too high 

ECU 001180.00- Inlet temperature of turbocharger is too high

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FAQs | John Deere Fault Codes List

How do you reset the code on a John Deere Fault?

To solve this problem, press and hold the [^] and [+] buttons simultaneously for 30 seconds to reset the code on a John Deere Fault. (You may have to do this up to three times.) The machine will then reboot and display “Self” in case you didn’t know what was causing the problem. If you do reset the code on a John Deere Fault, don’t panic. You can always change it back.

What is an ECU code?

Engine control unit (ECU) code definitions are used by mechanics and technicians to identify the problem with a vehicle. When you drive the car, the computer in your car (called an engine control unit or ECU) turns gas into power to move your vehicle forward. If there’s a problem with the ECU, it will throw a code. The car’s computer will read the codes to tell you what is wrong with your vehicle.

What does a John Deere 6420 weight?

The John Deere 6420 weighs approximately 938 pounds.

What is a Genetic Fault code?

The John Deere Genetic Fault Code is a digital code found on the tire, engine, and fuel injection control modules. The codes are used by John Deere when diagnosing potential problems with the equipment. They provide diagnostic information specific to the unit using them and allow for quick testing of faults. The Fault Codes use a “3-character” format that identifies what type of fault code was detected (e.g., Check Engine Light, Fault Code. This format allows John Deere to communicate the fault code to mechanics quickly.

Conclusion | John Deere Fault Codes List

John Deere fault codes list can be very different from other manufacturers. You can not always apply the diagnostic strategies for John Deere’s faults to other equipment brands. You must learn all of the engine faults listed in the John Deere Fault Code Manual by heart. As you investigate a problem, remember those codes that have been already encountered. This will help you determine whether or not your maintenance or repair is going to be successful. 

Be sure to use keys, not hammers, when removing or installing any equipment. If a hammer is used to force a part or component into place, you could cause further damage to the machine. If you own a John Deere tractor, you must have a manual on hand to look through before and after every use. This will allow you to understand the sequence of events that follow when something is wrong with your machine. Specifically, this manual will help you quickly locate the principal fault codes for your tractor.