B3801
Passenger Compartment Lamp Request Circuit
B3801 is an OBD-II diagnostic trouble code meaning: Passenger Compartment Lamp Request Circuit. Common causes: open or short circuit in wiring harness, door switch malfunction. Estimated repair cost: $22–89.
Symptoms
- Incorrect operation of interior lighting
- Interior lamp does not turn on/off
- Interior lamp flashing for no reason
Causes
- Open or short circuit in wiring harness
- Door switch malfunction
- Poor contact in connectors
- Body control module failure
- Burnt out lamp or fuse
How to Fix
- Check the condition of the lighting circuit fuse
- Inspect the wiring harness for damage
- Check the operation of the door switches
- Test the lamp control circuit with a multimeter
- If necessary, replace faulty components
- Reset the error with an OBD-II scanner
Related codes
Error B3801 by Vehicle Brand
FAQ
What does the B3801 code mean?
B3801 is an OBD-II diagnostic trouble code that indicates: Passenger Compartment Lamp Request Circuit
What causes a B3801 error code?
The most common causes of B3801 include: Open or short circuit in wiring harness; Door switch malfunction; Poor contact in connectors; Body control module failure.
How do I fix a B3801 diagnostic trouble code?
To fix B3801: Check the condition of the lighting circuit fuse. Inspect the wiring harness for damage. Check the operation of the door switches. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B3801?
Yes, but get it checked soon
How much does it cost to fix B3801?
The estimated repair cost for B3801 is $22–89. Actual cost depends on your vehicle, location, and labor rates.
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