Body
Definition only
B0237: Backup Lamp Circuit
Standardized SAE J2012 code · B02xx codes
What does B0237 mean?
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.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
Common causes
- High Bulb burned out
- Medium Reverse switch failed
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of B0237 on the same make and model first.
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