B3806
High Beam and Headlamp Flash Select Circuit Malfunction
B3806 is an OBD-II diagnostic trouble code meaning: High Beam and Headlamp Flash Select Circuit Malfunction. Common causes: broken or damaged wiring harness, blown fuse. Estimated repair cost: $6–56.
Symptoms
- High beam headlights do not work
- The headlight flashing function does not work
- Flashing or flickering high beams
- Dashboard warning
Causes
- Broken or damaged wiring harness
- Blown fuse
- Faulty relay
- Problems with the lighting control module
- Faulty headlights
How to Fix
- Check and replace the fuse if necessary
- Check high beam control relay
- Inspect the wiring harness for damage
- Check contacts and connectors
- Diagnose the lighting control module
- Check that the headlights are working properly
Related codes
Error B3806 by Vehicle Brand
FAQ
What does the B3806 code mean?
B3806 is an OBD-II diagnostic trouble code that indicates: High Beam and Headlamp Flash Select Circuit Malfunction
What causes a B3806 error code?
The most common causes of B3806 include: Broken or damaged wiring harness; Blown fuse; Faulty relay; Problems with the lighting control module.
How do I fix a B3806 diagnostic trouble code?
To fix B3806: Check and replace the fuse if necessary. Check high beam control relay. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B3806?
Do not drive — repair immediately
How much does it cost to fix B3806?
The estimated repair cost for B3806 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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