Rear Left Side Door Switch Input Circuit Short to Ground
The rear left side door switch circuit has a short to ground condition.
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What it means (plain English)
The computer expects a voltage signal from the rear left door switch that tells it whether the door is open or closed. If the wiring is damaged or if there is a fault in the switch, the computer sees a constant low voltage (close to 0 volts) instead of the expected voltage (around 5 volts).
What the computer is actually seeing
The vehicle's powertrain control module (PCM) sees a voltage level of 0 volts on the rear left door switch input when it should see a signal closer to 5 volts when the door is closed.
What a healthy reading looks like
When the door is closed, expect around 5 volts; when the door is open, the voltage should drop to 0 volts (or near it).
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 leading to the rear left door switch for visible damage or corrosion. If found, repair the wiring or connections. Decision Point: Did you find and fix any wiring issues? Yes: Clear the code, retest, if not fixed, continue. No: Continue to step 2.
- 22. Using a multimeter, check the voltage at the rear left door switch. Voltage should be around 5 volts when the door is closed. Decision Point: Do you see 5 volts? Yes: Switch is likely defective, replace the switch. No: Move to step 3.
- 33. Disconnect the switch and check the wiring harness for a short to ground using the multimeter. Decision Point: Is there a short to ground found? Yes: Repair the short in wiring. No: The fault may be in the PCM, further diagnostics needed.
Common causes
- Damaged wiring in the door harness
- Faulty door switch
- Loose or corroded connector
- Moisture intruding in the switch area
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
While you can drive the vehicle, be aware that the door status may not be reported accurately, which could cause issues with child safety locks and alarm systems.
Will this code come back after I clear it?
If the underlying issue is not resolved, the code may return after clearing.
Why is this code paired with others?
Multiple door switch faults can occur from similar wiring issues or problems in the BCM (Body Control Module), which manages these inputs.
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