Rear Left Reading Light Circuit Malfunction
The B0163 code means the vehicle's onboard diagnostic system has detected: Rear Left Reading Light Circuit Malfunction. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- easy
- Estimated cost
- $5 - $120 (parts and labor)
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Common Symptoms
- Reading light not illuminating
- Passenger reading light not working
- Reading light switch not responding
- Reading light dim or flickering
Probable Causes (Ranked by Likelihood)
- Burned out reading light bulb Very High
- Failed reading light switch High
- Corroded reading light socket Moderate
- Wiring fault in headliner Low
Step-by-Step Diagnostic Procedure
-
Inspect reading light bulb
-
Test reading light switch
-
Check socket for corrosion
-
Inspect wiring in headliner
Frequently Asked Questions
Can passengers control the reading light?
Yes, reading lights have individual switches for each passenger position.
Are reading light bulbs the same as front?
Often yes, but check your owner manual as some use different types.
Can I add reading lights?
Aftermarket overhead reading lights can be installed but require routing wiring through the headliner.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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