Keyless Entry System Malfunction
The vehicle's keyless entry system is having issues.
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 keyless entry system isn't working right, which could be due to a problem with the key fob, like a dead battery or the system in the car failing to recognize the fob.
What the computer is actually seeing
The vehicle's BCM (Body Control Module) detects an abnormality in the keyless entry signal from the key fob, either missing or inconsistent signals, typically showing a voltage below 3 volts when the fob is activated.
What a healthy reading looks like
Expected signal voltage from key fob activation should be around 12 volts; BCM should receive a clear digital signal indicating the key fob is present within 3-5 feet of the vehicle.
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 key fob battery; replace it if it's dead or low (below 3 volts).
- 22. Inspect the keyless entry antenna for physical damage or corrosion.
- 33. Test the wiring and connectors between the antenna and the BCM for continuity and shorts; resistance should be near 0 ohms without breaks.
- 44. Verify the BCM functionality by using a scan tool to monitor signals and communication; look for any other stored codes that might indicate a larger issue.
Common causes
- Dead key fob battery
- Faulty keyless entry antenna
- Damaged wiring to the antenna or BCM
- Corroded connectors in the keyless entry circuit
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, it is safe to drive, but you may have trouble starting the vehicle or using the remote functions.
Will this code come back after clearing it?
If the underlying issue isn't fixed, yes, it will likely return.
Why does this code sometimes pair with other codes?
This code may pair with others related to security or key fob functions, indicating multiple failures in the keyless entry system.
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 →