B0800
Headlamp Switch Circuit
A fault has been detected in the headlamp switch circuit. Light functions may not switch properly.
A fault has been detected in the headlamp switch circuit. Light functions may not switch properly.
Common causes
- high
Headlamp switch internal failure
One of the most commonly reported causes for this code — check this first.
Typical part cost: $70-330
- medium
Loose switch connector
A plausible cause — test and verify before replacing parts.
Typical part cost: $70-330
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does B0800 mean?
B0800 means "Headlamp Switch Circuit". It is a generic OBD-II code that points to a fault in the body.
What are the most common causes of B0800?
headlamp switch internal failure; loose switch connector — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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