OBD-II code · Body
B0235 Brake Lamp Circuit
The body control module has detected a fault in the brake lamp circuit. One or more brake lamps do not match the commanded state — a safety-relevant fault.
Is it safe to drive with B0235?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyBulb burned out
- PossibleBrake light switch failed
Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.2–1 h
- Emissions test
- Usually unaffected
- Parts involved
- Brake Lamp, Brake Light Switch, Body Wiring Harness
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.