B3808
Rear Door Lock Relay Circuit
B3808 is an OBD-II diagnostic trouble code meaning: Rear Door Lock Relay Circuit. Common causes: open or short circuit in wiring harness, lock relay malfunction. Estimated repair cost: $33–111.
Symptoms
- Rear door won't lock or unlock
- Rear door locks/unlocks with delay
- Hazard warning light flashes when attempting to lock
Causes
- Open or short circuit in wiring harness
- Lock relay malfunction
- Damage to the lock itself
- Poor contact in connectors
- Contact corrosion
How to Fix
- Check wiring harness for open or short circuit
- Check the lock relay for functionality
- Inspect connectors and contacts for corrosion
- Replace a faulty relay or lock
- Clean contacts from corrosion
Related codes
Error B3808 by Vehicle Brand
FAQ
What does the B3808 code mean?
B3808 is an OBD-II diagnostic trouble code that indicates: Rear Door Lock Relay Circuit
What causes a B3808 error code?
The most common causes of B3808 include: Open or short circuit in wiring harness; Lock relay malfunction; Damage to the lock itself; Poor contact in connectors.
How do I fix a B3808 diagnostic trouble code?
To fix B3808: Check wiring harness for open or short circuit. Check the lock relay for functionality. Inspect connectors and contacts for corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B3808?
Do not drive — repair immediately
How much does it cost to fix B3808?
The estimated repair cost for B3808 is $33–111. Actual cost depends on your vehicle, location, and labor rates.
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