FMI 0 - Door Lock - Failed to Respond
The door lock system is not responding as expected.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The vehicle's computer is trying to check the door lock's status, but it's not getting a response. This can be due to wiring issues or the lock actuator itself.
What the computer is actually seeing
The computer sees no change in voltage or response from the door lock actuator when commanded to lock/unlock in less than 200 milliseconds.
What a healthy reading looks like
Expected voltage at the actuator should be between 10 to 14 volts when activated. Response should occur within 200 milliseconds of the signal.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check the door lock actuator wiring for any visible damage or corrosion.
- 22. Inspect the connector for bent pins or poor connection. Repair any issues found.
- 33. Test the actuator directly by applying 12V to it to see if it operates. If it doesn't, replace the actuator.
- 44. Measure the voltage at the actuator while someone operates the lock switch. If there's no voltage, check the fuse and relay.
- 55. If all previous checks are good, inspect the power supply circuit back to the ECU and ensure proper voltage outputs.
Common causes
- Faulty door lock actuator
- Wiring issues (broken or shorted wires)
- Bad connector at the actuator or ECU
- Power supply issues (fuses or relays)
Typical repair cost
$$ - $$$ (depending on parts and labor for actuator or wiring repairs)
Related codes
Frequently asked questions
Is it safe to drive the vehicle with this code?
It's generally safe to drive, but the door lock function will be compromised.
Will this code come back if I clear it?
If the underlying issue isn't fixed, yes, the code will return.
Why does this code pair with other SPN codes?
They often relate to the same system components, indicating multiple issues from a single fault.
Working a real vehicle right now?
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