John Deere 654.18 – Engine Control Unit (ECU): Injector #4 Not Responding / Fuel Injector #4 Flow Very Low

The Engine Control Unit (ECU) has detected that the fuel delivery amount from the number four fuel injector is below the expected threshold. This indicates a problem with the operation, communication, or sealing of the specified injector, which can lead to an engine power derate as a protective measure.

• 5085E
• 5090E
• 5090EL
• 5100E
• 5065M
• 5075M
• 5085M
• 5100M
• 5100MH
• 5100ML
• 5115ML
• 5090M
• 5115M
• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 8120
• 8130
• 8295R
• 8310R
• 8320R
• 8330
• 8430
• 8530
• 9470RT
• 9520RT
• 9560
• 9660
• 9670
• S660
• S670
• S770
• T670
• W660
• 350GLC
• 380GLC
• E330LC
• E360
• 670G
• 770G
• 772G
• 870G
• 872G
• 4930
• 4940
• R4038
• R4045

1. 1

   Verify the fuel tank level and check the fuel filters for clogs or restrictions, as poor fuel supply can trigger low flow codes

2. 2

   Inspect the wiring harness and connectors leading to Injector #4. Look for frayed wires, corrosion, or loose pins

3. 3

   Perform a continuity and resistance test on the suspected injector circuit to rule out a short to ground or an open circuit

4. 4

   Ensure the injector's QR code calibration data in the ECU is correct. An invalid QR code can cause the injector to malfunction

5. 5

   Use John Deere Service Advisor to run a cylinder contribution test or injector cutoff test to pinpoint if the failure is strictly mechanical or electrical

1. 1

   Isolate the Fault

   If wiring and fuel supply are confirmed good, the fault lies within the #4 fuel injector itself.

2. 2

   Remove the Faulty Injector

   Depressurize the fuel system. Disconnect the electrical harness and high-pressure fuel lines from Injector #4. Remove the hold-down clamp and extract the injector.

3. 3

   Install the New Injector

   Clean the injector bore. Install the new injector using a new nozzle kit, O-rings, and hold-down hardware. Reconnect the fuel lines and torque to OEM specifications.

4. 4

   Code the Injector

   You must use John Deere Service Advisor (or an equivalent diagnostic tool) to program the new injector's specific QR code/calibration code into the ECU.

5. 5

   Reset and Test

   Clear the 000654.18 fault code from the ECU. Prime the fuel system, start the engine, and conduct a system test under load to ensure proper fuel flow and verify no codes return.