John Deere 000655.02 – ECU: Injector Number 5 Code Error

The Engine Control Unit (ECU) has detected an issue with the data it is receiving from the electronic fuel injector for cylinder number 5. This indicates an error in the electronic handshake between the injector and the ECU, preventing the ECU from validating the part data and controlling the injector correctly. It is an electronic communication fault rather than a mechanical failure.

• 9230
• 9330
• 9430
• 9530
• 9630
• 8R Series
• 8RW Series
• 8245R
• 8400R
• 6130 to 6930 Series Tractors
• PowerTech 6.8L 6-cylinder engines

1. 1

   Use a diagnostic scanner to record and clear the fault code, then restart the engine to confirm if 000655.02 reappears as an active issue

2. 2

   Visually inspect the wiring harness and connectors leading to the number 5 fuel injector for chafed wires, frayed wires, loose connections, or corrosion in the pins

3. 3

   Check for related injector circuit fault codes, such as high or low resistance (000655.05, 000655.06) or calibration faults (000655.13), which can indicate an open or short circuit

1. 1

   Disconnect battery

   Disconnect the negative battery terminal before beginning work on the fuel system wiring for safety.

2. 2

   Access Injector #5

   Remove engine covers, the valve cover, and potentially other components to gain access to the fuel rail and the number 5 injector.

3. 3

   Clean injector connector

   Disconnect the electrical connector from the number 5 injector. Clean both the injector and harness sides with electrical contact cleaner. Reconnect firmly and ensure it is latched securely.

4. 4

   Test injector circuit

   If the problem persists, test the wiring harness between the ECU and the injector for continuity and shorts using the machine's specific wiring diagrams.

5. 5

   Replace fuel injector

   If wiring is confirmed good, relieve fuel system pressure and disconnect the high-pressure fuel line (cap immediately). Remove the hold-down clamp and injector. Install the new injector with clean bore, new seals, and O-rings lightly coated in clean engine oil. Torque clamp to spec, reconnect the high-pressure fuel line and the electrical connector, and reassemble all other components that were removed.

6. 6

   Calibrate new injector

   Reconnect the battery. Calibrate the new injector to the ECU using John Deere Service ADVISOR or a compatible diagnostic tool to ensure proper engine performance and prevent calibration fault code 000655.13.