ECU 000612.03 – Injection Valve Driver 2 Voltage Too High. John Deere System Advisory.

ECU 000612.03 (ECU 612.03)

Code: 000612.03

Shortcode: 612.03


Error code ECU 000612.03 indicates a fault in the circuit of injection valves 4 to 6, with a condition of being open or shorted to a 12-volt source. This condition can lead to uncontrolled fuel injector operation, affecting engine performance.


The ECU may deactivate the affected injectors to prevent engine damage due to over-fueling or erratic fuel delivery.


  • Inspect Injector Wiring: Check for damaged or frayed wiring that may be causing a short to the power supply.
  • Test Electrical Connections: Utilize a multimeter to identify and confirm the source of the high voltage issue.
  • Repair or Replace Faulty Wiring: Address any issues by repairing or replacing damaged wires or connectors.
  • Reevaluate System Functionality: After repairs, perform a system check to ensure that all injectors are functioning correctly and the issue is resolved.


Prompt attention to injector circuit faults is crucial to maintaining engine performance and preventing potential damage.

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