Front Right Turn Signal Circuit Malfunction
The B0037 code means the vehicle's onboard diagnostic system has detected: Front Right Turn Signal Circuit Malfunction. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- easy
- Estimated cost
- $5 - $250 (parts and labor)
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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
-
Inspect front right turn signal bulb condition
-
Check socket for corrosion or loose contacts
-
Verify voltage at socket with turn signal engaged
-
Inspect wiring harness in fender and bumper area
-
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.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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