OBD-II code · Body
B0800 Headlamp Switch Circuit
A fault has been detected in the headlamp switch circuit. Light functions may not switch properly.
Is it safe to drive with B0800?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyHeadlamp switch internal failure
- PossibleLoose switch connector
Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Headlamp Switch, Body Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.