John Deere 000651.02 – ECU: Electronic Fuel Injector #1 Data Invalid

The Engine Control Unit (ECU) is not receiving the correct identifying information from the number 1 electronic fuel injector. This fault indicates a problem in the electronic communication or calibration data of the injector rather than a purely mechanical failure, which may affect the proper operation of the fuel injection system. It can be caused by a faulty injector, wiring issues, or an ECU problem.

• 5090M
• 5100M
• 5100MH
• 5100ML
• 5115M
• 5115ML
• 5065M
• 5075M
• 5085M
• 5095M
• 5095MH
• 5105M
• 5015ML
• 5085E
• 5090E
• 5090EL
• 5100E
• 8235R
• 8260R
• 8285R
• 8310R
• 8335R
• 8360R
• 8130
• 8230
• 8330
• 8430
• 8530
• 9230
• 9330
• 9430
• 9530
• 9630
• 9570R
• 9570RT
• 9570RX
• 9620R
• 9620RX
• 9R 640

1. 1

   Inspect the wiring harness and connectors leading to the number 1 fuel injector for any signs of damage, corrosion, or loose connections. A short in the wiring can trigger this fault code.

2. 2

   Check for other active fault codes (e.g., 000651.05, 000651.06) indicating high or low resistance in the injector circuit, which points directly to a wiring or injector coil issue.

3. 3

   Perform basic electrical checks to verify correct voltage and ground at the injector connector.

1. 1

   Reprogram ECU

   If a new injector is installed, the ECU may need to be reprogrammed with the new injector's data.

2. 2

   Replace fuel injector

   If the injector itself is faulty, it will need to be replaced. It is often recommended to replace the entire set of injectors to ensure balanced engine performance.

3. 3

   Repair wiring harness

   If damage is found in the wiring harness, it will need to be repaired or replaced.