OBD-II code · Body
B0237 Backup Lamp Circuit
The body control module has detected a fault in the backup (reverse) lamp circuit. The lamp does not match the commanded state when reverse gear is engaged.
Is it safe to drive with B0237?
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
- PossibleReverse 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
- Backup Lamp, Reverse Switch, Body Wiring Harness
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.