Driver Door Open Switch Circuit Range/Performance Problem
Issues with the driver door open switch signaling to the body control 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 is checking if the driver’s door is open or closed. A problem means the computer isn’t getting the correct signal from the door switch, which can cause lights to stay on or the vehicle to think the door is always open.
What the computer is actually seeing
The body control module expects a binary signal from the door switch — either 0 volts (door closed) or about 12 volts (door open). If it sees incorrect voltages, it sets the code.
What a healthy reading looks like
Driver door switch should show 0 volts when closed and 12 volts when open.
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 driver door switch for proper operation by using a multimeter. Check for 0 volts when door is closed and 12 volts when door is open.
- 2Check the wiring harness for any visible damage or wear, especially in the door hinge area where it bends.
- 3Measure voltage at the body control module connector to ensure it matches expected values (0V closed, 12V open).
- 4Inspect for any poor ground connections and clean or repair as necessary.
- 5If all previous checks are good, consider replacing the driver door switch.
Common causes
- Faulty driver door switch
- Wiring issues in the door circuit
- Faulty body control module
- Poor ground connections
- Corroded or bent pins in the connector
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but you may experience issues like interior lights staying on or warnings about the door being open.
Will this code come back after clearing?
If the issue isn't fixed, yes, it will likely return after driving.
Why does this code pair with B1045?
Both codes relate to the driver door switch; one might indicate a circuit issue while the other could indicate the switch itself is faulty.
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