B3801

Passenger Compartment Lamp Request Circuit

Severity

✅ Low

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$22–89 (est.)

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

B3802 B3803 B3800