Left Front Door Open Circuit
The left front door switch is not signaling correctly.
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 computer thinks the left front door isn't closed because the switch isn’t working properly.
What the computer is actually seeing
The Body Control Module (BCM) expects a voltage signal when the door is closed (usually around 0V for closed, 12V for open). It sees an open circuit instead, meaning no voltage change indicating the door position.
What a healthy reading looks like
Expected voltage at the switch should be 0V (closed) and around 12V (open). If the switch is working, you should measure these values.
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 door switch wiring for damage or corrosion. If you find any issues, repair them and retest. DECISION: If fixed, clear the code and observe. If not, proceed to step 2.
- 22. Inspect the electrical connector at the door switch, ensuring it's seated correctly and free of corrosion. If corroded, clean or replace the connector. DECISION: If it resolves the issue, clear codes. If not, go to step 3.
- 33. Test the door switch with a multimeter: Disconnect the switch and check for continuity. Close the door and check for voltage changes (should be 0V when closed). If there's no change or faulty readings, replace the switch. DECISION: If switch replacement fixes the issue, clear codes. If code persists, check BCM in step 4.
- 44. If steps 1-3 check out and the switch is functioning, probe the BCM wiring for shorts or opens using a wiring diagram. If found, repair and retest. If BCM shows no external issues but is suspected, consider replacing the BCM.
Common causes
- Faulty door switch
- Wiring issues like shorts or breaks in the harness
- Connector corrosion or poor contact
- Body Control Module (BCM) failure
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but the door ajar warning could stay on, and you may not have functional door locks.
Will this code come back after I clear it?
If the issue is still present, yes; if fixed properly, it shouldn't return.
Why do I sometimes see this with other codes?
This fault can often accompany other codes if multiple switches or circuits share wiring.
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