Lamps Control Module (LCM) - Invalid State
The vehicle's lamps control module has detected an invalid state.
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 lamps control module is like a traffic director for your vehicle's lights. If it senses something wrong—like a bulb out or a wiring issue—it freaks out and throws this code.
What the computer is actually seeing
The lamps control module monitors inputs from light sensors and switches to maintain correct lighting operation. If it detects a value outside its expected range, it triggers this fault.
What a healthy reading looks like
Voltage at the switch should be between 0V (off) and 12V (on), with proper ground connections.
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 for the lamps control module for damage or corrosion. Fix as needed. Decision Point: If all wiring is intact, proceed to step 2. If damage is found, repair it and clear the code.
Common causes
- Faulty lamps control module
- Wiring issues or shorts in the lamp circuits
- Burnt-out bulbs or incorrect bulb types
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but you may have impaired lighting functionality which can be unsafe.
Will this code come back after clearing it?
If the underlying issue isn't fixed, yes, it will return.
Why does this code sometimes pair with other lamp control codes?
Multiple codes may indicate similar wiring issues or failures in the control module affecting multiple outputs.
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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