John Deere 96 – CCU, E02, CPC, or ECU: Fuel Level Fault

The system has detected an issue related to the fuel level. The control unit received a signal from the fuel level sensor that is outside of the expected range or is otherwise inconsistent. This indicates a failure in the component responsible for monitoring fuel level, which could be caused by a short to power, a short to ground, an open circuit, a faulty sender unit, or a CAN bus communication error.

• 6115M
• 5045E
• 5050E
• 5055E
• 5058E
• 5060E
• 5065E
• 5075E
• 9230
• 9330
• 9430
• 9530
• 9630
• 9320T
• 9420T
• 9520T
• 9620T
• 9540
• 9560
• 9580
• 9640
• 9660
• 9680
• 9560 STS
• 9660 STS
• 9760 STS
• 9860 STS
• 9570 STS
• 9650 STS
• 9660 WTS
• 9670 STS
• 9750 STS
• 9770 STS
• 9870 STS
• 4730
• 4830
• 4920
• 4930
• 4940
• 850J

1. 1

   Check for other active fault codes, particularly those related to battery voltage or CAN bus communication errors, as these can cause erroneous fuel level readings.

2. 2

   Visually inspect the wiring harness and connectors between the fuel level sender and the control unit for signs of damage, corrosion, loose connections, or a faulty ground.

3. 3

   Inspect the fuse panel for any blown fuses related to the instrument cluster or control units.

4. 4

   Check for 12 volts at the two wires connecting to the fuel sending unit using a multimeter. A lack of power points to a wiring or fuse issue.

5. 5

   Test the fuel gauge by disconnecting the wire from the fuel sender and grounding it with a jumper wire. With the key in the 'run' position, a functioning gauge should read full.

6. 6

   Test the fuel sender by disconnecting the sender wire and measuring resistance between the sender's terminal and a good ground. Resistance should change as the float moves (approximately 10 ohms when empty and 181-240 ohms when full on some models). An unchanging reading indicates a faulty sender.

1. 1

   Access the fuel sending unit

   Locate the fuel sending unit in the fuel tank (often accessible from behind the operator's seat on tractors). Ensure the fuel level is low or drain the tank before removal to prevent spills.

2. 2

   Disconnect and remove

   Disconnect the electrical connector and remove the screws securing the sending unit to the tank. Carefully lift the unit out of the tank.

3. 3

   Install the new unit

   Place the new fuel sending unit into the tank, ensuring the gasket is in good condition to prevent leaks. Secure it with the mounting screws.

4. 4

   Reconnect and test

   Reconnect the electrical wiring. Before starting the machine, turn the key to the 'run' position to apply power and check if the fuel gauge responds correctly (it may take a moment to update).

5. 5

   Clear fault codes

   After the repair is complete, clear the fault codes from the control unit's memory.