Error in Roof Module
Indicates a fault within the roof module of the vehicle.
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 roof module is responsible for controls related to the sunroof and overhead lights. When it sees a problem, it triggers this code.
What the computer is actually seeing
The vehicle's computer detects an out-of-spec signal or a fault within the roof module circuitry, possibly due to a short circuit or dead module.
What a healthy reading looks like
Expected voltage levels in the roof module circuits should be around 12V when active; signals should show proper logic levels per module specification.
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 roof module connectors for corrosion or damage. If present, repair as necessary. Decision: Repair done? If yes, clear code, retest. If no, continue to step 2.
- 22. Check roof module wiring for shorts or opens with a multimeter. Look for expected 12V supply voltage at the module. Decision: Is voltage present? If yes, proceed to step 3. If no, repair wiring and retest.
- 33. Swap the roof module with a known good one if available. Decision: Does the fault code clear? If yes, replace the roof module. If no, proceed to step 4.
- 44. Check for any additional fault codes that might relate to other systems affecting the roof module. Repair any found codes. After repairs, retest system.
Common causes
- Faulty roof module
- Wiring issues (shorts/open circuits)
- Corroded connectors or terminals
- Water intrusion in module area
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, you can drive, but expect malfunctioning roof functions like sunroof or lighting.
Will this code come back if I clear it?
It may return if the root issue isn't fixed, like a faulty module or wiring.
Why does this code appear with sunroof issues?
The roof module controls the sunroof; faults here directly impact its operation.
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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