Front Right Turn Signal Circuit Malfunction
What does B0037 mean?
The B0037 code means the vehicle's onboard diagnostic system has detected: Front Right Turn Signal Circuit Malfunction. This is a moderate severity code.
Common Symptoms
- Front right turn signal not illuminating
- Fast blink on right turn signal activation
- Right front signal dim or flickering
- Right turn signal indicator on dash blinks rapidly
- Hazard lights missing right front flash
Probable Causes (Ranked by Likelihood)
- Burned out front right turn signal bulb Very High
- Corroded bulb socket or poor ground High
- Wiring damage near front right fender Moderate
- Turn signal control module failure Low
Step-by-Step Diagnostic Procedure
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Inspect front right turn signal bulb condition
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Check socket for corrosion or loose contacts
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Verify voltage at socket with turn signal engaged
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Inspect wiring harness in fender and bumper area
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Test turn signal switch operation at steering column
Frequently Asked Questions
Why does my turn signal work sometimes and not others?
Intermittent operation usually points to a corroded or loose bulb socket. The vibration from driving can cause a poor connection to make and break contact repeatedly.
Should I replace both front bulbs at the same time?
It is a good practice. If one bulb has burned out, the other is likely nearing end of life too. Replacing both ensures even brightness and avoids a repeat repair soon after.
Can a front-end collision damage the turn signal circuit?
Yes. Even minor front-end impacts can damage wiring, connectors, or sockets in the bumper and fender area where turn signal wiring is routed.