P0612
Fuel Injector Control Module Relay Control
P0612 is an OBD-II diagnostic trouble code meaning: Fuel Injector Control Module Relay Control. Common causes: faulty ficm power relay (stuck, coil broken), open or short circuit in the relay control circuit. Estimated repair cost: $3–278.
Symptoms
- The Check Engine light comes on
- Difficulty starting or failure to start
- Unstable engine operation
- Misfire
- Injector failure due to faulty FICM power relay
Causes
- Faulty FICM power relay (stuck, coil broken)
- Open or short circuit in the relay control circuit
- Damage to relay connector or wiring
- ECU malfunction (relay control output transistor)
- Relay circuit fuse is damaged
How to Fix
- Check FICM relay circuit fuse
- Check FICM relay - replace with a known good one
- Measure the voltage on the relay coil when commanded by the ECU
- Check the wiring and connectors between the ECU and the relay for open/short circuits
- If the external circuit is normal, check the output signal of the relay control ECU
- If the ECU is confirmed to be faulty, repair or replace the unit
Related codes
Error P0612 by Vehicle Brand
FAQ
What does the P0612 code mean?
P0612 is an OBD-II diagnostic trouble code that indicates: Fuel Injector Control Module Relay Control
What causes a P0612 error code?
The most common causes of P0612 include: Faulty FICM power relay (stuck, coil broken); Open or short circuit in the relay control circuit; Damage to relay connector or wiring; ECU malfunction (relay control output transistor).
How do I fix a P0612 diagnostic trouble code?
To fix P0612: Check FICM relay circuit fuse. Check FICM relay - replace with a known good one. Measure the voltage on the relay coil when commanded by the ECU. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0612?
Yes, but get it checked soon
How much does it cost to fix P0612?
The estimated repair cost for P0612 is $3–278. Actual cost depends on your vehicle, location, and labor rates.
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