Left Rear Door Open Switch Circuit Short to Ground
There's a short to ground in the circuit for the left rear door open switch.
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 rear door is open all the time because the switch circuit is shorted to ground.
What the computer is actually seeing
The vehicle's Body Control Module (BCM) continuously receives an input reading of 0 volts from the left rear door switch, which should normally see 12 volts when closed.
What a healthy reading looks like
When the left rear door is closed, the switch should output between 10-12 volts to the BCM. If the door is open, it should read ground (0 volts).
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 left rear door switch connector for corrosion or damage. Decision: If damaged, repair or replace connector.
- 22. Check fuse related to the door switch circuit. Decision: If blown, replace the fuse and recheck the circuit.
- 33. Use a multimeter to check voltage at the left rear door switch when the door is closed. Decision: If no voltage (0 volts), suspect the switch.
- 44. Check door harness wiring for shorts (continuity to ground) using a multimeter. Decision: If a short is found, repair the wiring.
- 55. If all wiring checks out, replace the left rear door switch.
Common causes
- Damaged wiring in the door harness
- Faulty left rear door switch
- Moisture intrusion causing a short
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, you can drive, but you may experience issues with door locks and security features.
Will this problem come back?
If the underlying cause (like wiring issues) isn't fixed, it can return.
Why is this related to other codes?
These codes often stem from similar circuit issues in the vehicle's door control system.
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