B3948
Left Front Turn Signal Circuit
B3948 is an OBD-II diagnostic trouble code meaning: Left Front Turn Signal Circuit. Common causes: burnt out turn signal lamp, broken or damaged wires. Estimated repair cost: $6–33.
Symptoms
- Left front turn signal does not work
- Turn signals flash faster than usual
- Error message on the dashboard
Causes
- Burnt out turn signal lamp
- Broken or damaged wires
- Poor contact in connectors
- Turn signal relay malfunction
- Wiring harness problem
How to Fix
- Check the condition of the left front turn signal lamp
- Inspect wires and connectors for damage
- Check turn signal relay
- Test the wiring harness for continuity
- Replace faulty components
Related codes
Error B3948 by Vehicle Brand
FAQ
What does the B3948 code mean?
B3948 is an OBD-II diagnostic trouble code that indicates: Left Front Turn Signal Circuit
What causes a B3948 error code?
The most common causes of B3948 include: Burnt out turn signal lamp; Broken or damaged wires; Poor contact in connectors; Turn signal relay malfunction.
How do I fix a B3948 diagnostic trouble code?
To fix B3948: Check the condition of the left front turn signal lamp. Inspect wires and connectors for damage. Check turn signal relay. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B3948?
Limited driving only, diagnose soon
How much does it cost to fix B3948?
The estimated repair cost for B3948 is $6–33. Actual cost depends on your vehicle, location, and labor rates.
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