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.
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.
Common causes
- high
Bulb burned out
One of the most commonly reported causes for this code — check this first.
Typical part cost: $10-170
- medium
Reverse switch failed
A plausible cause — test and verify before replacing parts.
Typical part cost: $10-170
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does B0237 mean?
B0237 means "Backup Lamp Circuit". It is a generic OBD-II code that points to a fault in the body.
What are the most common causes of B0237?
bulb burned out; reverse switch failed — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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