License Plate Lamp Circuit Malfunction
What does B1010 mean?
The B1010 code means the vehicle's onboard diagnostic system has detected: License Plate Lamp Circuit Malfunction. This is a low severity code.
Common Symptoms
- License plate lights not illuminating
- Exterior light warning on dashboard
- License plate not visible at night
- Intermittent license plate light
- Failed vehicle inspection for lighting
Probable Causes (Ranked by Likelihood)
- Burned out license plate light bulb Very High
- Corroded bulb socket from water exposure High
- Cracked or damaged license plate light lens Moderate
- Loose wiring at license plate light connector Moderate
- Blown fuse for license plate light circuit Low
Step-by-Step Diagnostic Procedure
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Check license plate light bulbs
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Inspect bulb sockets for corrosion
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Check lens housing for cracks or water intrusion
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Test voltage at license plate light connector
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Verify fuse is intact
Frequently Asked Questions
Can I get a ticket for a license plate light being out?
Yes. Most jurisdictions require the license plate to be illuminated at night. A burned out license plate light is a common reason for traffic stops.
Why do license plate lights fail so often?
License plate lights are exposed to road spray, dirt, and moisture, which corrodes the sockets and shortens bulb life compared to interior-protected lights.
How do I replace the license plate light bulb?
Most license plate lights are accessed by removing one or two screws on the light lens from outside the vehicle. The bulb simply pulls out of the socket.