Right Tail Light Circuit Open
The B0041 code means the vehicle's onboard diagnostic system has detected: Right Tail Light Circuit Open. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- easy
- Estimated cost
- $5 - $200 (parts and labor)
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Common Symptoms
- Right tail light does not illuminate
- Tail light failure warning message
- Right rear of vehicle dark at night
- Reduced rear visibility to other drivers
- Inspection failure for lighting
Probable Causes (Ranked by Likelihood)
- Burned out right tail light bulb Very High
- Corroded right tail light socket High
- Open wire in right tail light circuit Moderate
- Faulty tail light assembly ground connection Low
Step-by-Step Diagnostic Procedure
-
Check right tail light bulb visually
-
Inspect socket for corrosion or damage
-
Test for voltage at socket with lights on
-
Verify tail light fuse condition
-
Check ground wire at right tail light mounting point
Frequently Asked Questions
Can a bad ground cause only one tail light to fail?
Yes. Each tail light typically has its own ground connection at the light assembly or nearby body panel. A corroded or loose ground on one side will cause only that side to fail.
How often should I check my tail lights?
It is good practice to do a walk-around check of all exterior lights once a month, or before any long trip. Many drivers do not realize a tail light is out until someone tells them.
Are tail light bulbs universal?
No. Different vehicles use different bulb types and sizes. Common types include 194, 168, 921, and 7443. Always check your owner's manual or the existing bulb number before purchasing.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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