B1503
Low Severity (Level 1)Lamp Turn Signal Right Circuit Failure
B1503 usually means lamp Turn Signal Right Circuit Failure.
Can you still drive with B1503?
✅Safe to drive — this is an informational or minor issue. Schedule diagnosis at your convenience.
Typical repair cost: $10 – $200
Severity Level 1 — Low
This code indicates a minor issue that is unlikely to cause immediate driveability problems. You can typically continue driving but should have the vehicle inspected at your earliest convenience.
Common Symptoms
- Warning light or message on dashboard related to the turn signal/hazard system
- Turn signals not functioning as expected
- Diagnostic trouble code (DTC) stored in module memory
- Fault may be intermittent — code may clear itself and reappear
- Reduced vehicle functionality related to the turn signal/hazard system
Possible Causes
- Failed turn signal flasher — internal fault from age, heat cycling, and vibration
- Damaged wiring or corroded connector in the turn signal/hazard system circuit
- Blown fuse for the turn signal/hazard system circuit — check before replacing components
- Faulty control module driving the turn signal flasher
- Loose or corroded ground point shared by the turn signal/hazard system
Common Fixes
- Scan vehicle with a professional-grade OBD2 scanner to read all stored codes and freeze frame data — note the conditions when the code set ($30-97 at shop, free at auto parts store for basic scan)
- Visually inspect the turn signal/hazard system wiring harness and connectors — look for chafed wires, melted insulation, green corrosion, loose pins, or rodent damage (often free to check yourself, $68 diagnostic fee at shop)
- Replace turn signal flasher if testing confirms it has failed — use OEM quality, avoid the cheapest no-name aftermarket parts that fail in a year ($10-200)
- Check and replace any blown fuses in the turn signal/hazard system fuse circuit — if fuse blows again, there's still a short that needs to be found ($2-18 for fuses)
- Perform a wiggle test on the turn signal/hazard system wiring harness while monitoring live data — see if the fault returns when you move the harness at different points ($0-124 diagnostic labor)
Estimated Repair Cost
These are estimated costs based on generic repair data. Actual costs may vary depending on your vehicle, location, and labor rates.
Frequently Asked Questions
What does B1503 mean?
B1503 stands for "Lamp Turn Signal Right Circuit Failure". B1503 usually means lamp Turn Signal Right Circuit Failure.
Can you drive with B1503?
Safe to drive — this is an informational or minor issue. Schedule diagnosis at your convenience.
How much does it cost to fix B1503?
Repair costs for B1503 typically range from $10 to $200, depending on your vehicle make, model, and local labor rates. Common fixes include: Scan vehicle with a professional-grade OBD2 scanner to read all stored codes and freeze frame data — note the conditions when the code set ($30-97 at shop, free at auto parts store for basic scan); Visually inspect the turn signal/hazard system wiring harness and connectors — look for chafed wires, melted insulation, green corrosion, loose pins, or rodent damage (often free to check yourself, $68 diagnostic fee at shop); Replace turn signal flasher if testing confirms it has failed — use OEM quality, avoid the cheapest no-name aftermarket parts that fail in a year ($10-200).
Will B1503 clear itself?
Explore Repair Costs
Related OBD-II Codes
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