Smart Key System Malfunction
The vehicle's smart key system has detected a malfunction.
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 smart key system is not working correctly, which could prevent you from starting the vehicle or using features like keyless entry.
What the computer is actually seeing
The computer sees abnormal voltage readings from the key fob system, typically less than 3 volts, or it detects a signal loss indicating that the fob is not communicating properly with the vehicle system.
What a healthy reading looks like
Key fob battery voltage should be above 3 volts when tested. Transmission signals from the key fob to vehicle should show consistent data packets every few milliseconds when buttons are pressed.
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 voltage is below 3 volts.
- 22. Inspect the key fob for physical damage or worn buttons. Test with another known working key fob.
- 33. Examine wiring and connectors related to the smart key system for damage or corrosion.
- 44. Use a scan tool to check for any other related trouble codes stored in the BCM.
- 55. If no other codes are present and key fob tests good, check the BCM settings and update if necessary.
Common causes
- Low key fob battery
- Faulty key fob
- Damaged wiring or connectors
- Issues with the vehicle's BCM (Body Control Module)
- Interference from other electronic devices
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It's best to avoid driving until the issue is resolved as you may not be able to start the vehicle.
Will the code come back after clearing it?
If the underlying issue isn't fixed, the code is very likely to return.
Why does this code appear with other codes?
The smart key system can trigger multiple codes when there are communication or power issues.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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