Keyless Entry Module (KEM) Power Control Circuit High
Indicates a high voltage condition in the keyless entry module circuit.
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What it means (plain English)
The keyless entry module is sensing too much voltage in its power circuit, which could cause it to malfunction or not work at all.
What the computer is actually seeing
The Keyless Entry Module (KEM) detects a voltage level above the expected range, generally more than 5 volts when it should be around 0 to 3 volts, triggering this code.
What a healthy reading looks like
Voltage should be between 0-5 volts; anything above 5 volts indicates a fault in the circuit.
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. Inspect the wiring and connectors leading to the Keyless Entry Module for signs of damage or corrosion. Decision: Proceed to step 2 if issues are found; repair as necessary before testing.
- 22. Using a multimeter, measure the voltage at the power input to the KEM with the ignition in the ON position. Expect a voltage between 0-5 volts. Decision: If voltage exceeds 5 volts, proceed to step 3; if within range, the module may be faulty.
- 33. Check for any shorts in the wiring harness between the KEM and the power source. Repair any shorts found. Decision: If no shorts are present and voltage is still high, replace the Keyless Entry Module.
- 44. Inspect the vehicle’s battery and ensure it's operating normally, with a voltage between 12.4 and 12.7 volts at rest. Decision: If the battery is low or faulty, replace it and recheck KEM operation before further action.
Common causes
- Faulty keyless entry module
- Damaged wiring or connectors
- Short circuit in the power circuit to the KEM
- Battery voltage issues
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally safe to drive, but the keyless entry feature may not work until it's fixed.
Will the code come back after clearing it?
Yes, if the underlying issue isn't resolved, the code will likely return.
Why does this code sometimes appear with other key-related codes?
They may share common circuits or components related to the keyless entry system.
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