Fault in Driver's Door Module
There's an issue with the driver's door control system module.
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 system that controls the driver's door functions isn't working right, which could affect locks or windows.
What the computer is actually seeing
The driver's door module isn't responding correctly to commands, possibly due to a wiring issue or faulty module.
What a healthy reading looks like
Module should respond within 50 milliseconds to any command signal; voltage should be 12V with minimal drop during operation.
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.
- 1Inspect the wiring and connectors between the driver's door and the main body harness. Look for cuts, frays, or corrosion.
- 2Check for any signs of water intrusion into the driver's door which could cause module failure.
- 3Use a scan tool to access the driver's door module and monitor for any live data or codes for more specific issues.
Common causes
- Damaged wiring in the driver's door harness
- Corroded or loose connectors at the door module
- Faulty driver's door control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, it's drivable, but you may lose functionality of the driver's door features like windows and locks.
Will this code come back after clearing it?
If the underlying issue persists, it likely will return after clearing.
What if it pairs with code B101B?
B101B usually indicates a communication error with the module; fix the communication issue first.
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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