OBD2 code B0800: Headlamp Switch Circuit
A fault has been detected in the headlamp switch circuit.
Detected Root Component
Body Component
Observed Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
Possible Causes
- Headlamp switch internal failure
- Loose switch connector
Tools Required
Interactive Diagnostic
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Diagnostic Result
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Parts likely to be the cause (Boîtier fusibles / BSI)
Boîtier fusibles / BSI
Photo d'illustration : Boîtier fusibles / BSI
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Frequently asked questions about code B0800
What does code B0800 mean? ▾
OBD2 code B0800: Headlamp Switch Circuit. A fault has been detected in the headlamp switch circuit.
What are the symptoms of code B0800? ▾
Code B0800 may cause: Warning light or symbol related to the affected system, Comfort or safety function impaired. The intensity of these symptoms varies depending on the vehicle and driving conditions.
What causes code B0800? ▾
The most common causes of code B0800 are: Headlamp switch internal failure, Loose switch connector. A proper OBD2 diagnostic will pinpoint the exact cause.
Is it serious to drive with code B0800? ▾
Code B0800 is generally benign (Info). It does not prevent driving, but a check helps rule out related issues.
How do I fix code B0800? ▾
Start by reading the code with an OBD2 scanner, then follow the interactive decision tree on this page. Priority causes to check: Headlamp switch internal failure, Loose switch connector. Difficulty: Easy · Estimated time: 30-60min.