Fault in the Keyless Entry Circuit
The keyless entry system has detected a fault in its circuit.
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 computer in the vehicle isn't getting the right signal from the keyless entry system. This can happen because of bad wiring, a broken switch, or a dead battery in the key fob.
What the computer is actually seeing
The Body Control Module (BCM) looks for a specific voltage signal (typically around 5 volts) from the key fob when the button is pressed or when the door handle is touched. If it doesn't see that signal, it triggers this code.
What a healthy reading looks like
5V signal expected from the key fob when activated; battery voltage for key fob should be over 2.8V.
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 battery in the key fob; it should be above 2.8 volts. Replace if necessary.
- 22. Inspect wiring and connectors in the keyless entry circuit for damage or corrosion, paying attention to any exposed wires.
- 33. Test the key fob by using it on another compatible vehicle. If it works, the fob is good; go to step 4.
- 44. Check continuity of the keyless entry wiring back to the BCM. Look for signal loss; repair any faults.
- 55. If all wiring is good, and the fob is functioning, test the BCM. If it doesn't respond correctly, it may need to be replaced.
Common causes
- Faulty key fob battery
- Bad wiring or connections in the keyless entry circuit
- Faulty Body Control Module (BCM)
- Switch malfunction in door lock/unlock
- Interference from aftermarket electronics
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, this code affects keyless entry functionality, but it won't impact drivability.
Will this code come back after clearing?
If the underlying issue isn't fixed, yes, the code is likely to return.
Why does this code appear with other codes?
Keyless entry issues often relate to similar systems, which can trigger multiple codes.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →