Front Left Footwell Light Circuit Malfunction
The B0133 code means the vehicle's onboard diagnostic system has detected: Front Left Footwell Light Circuit Malfunction. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- easy
- Estimated cost
- $10 - $150 (parts and labor)
Basic scanners skip body codes entirely. BlueDriver reads airbag, HVAC, lighting, and BCM codes through your phone.
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Common Symptoms
- Footwell light not illuminating
- No floor illumination at entry
- Footwell ambient light not working
- Footwell light stays on after door closes
Probable Causes (Ranked by Likelihood)
- Burned out footwell light LED Very High
- Failed footwell light driver circuit High
- Corroded footwell light connector Moderate
- BCM ambient light output fault Low
Step-by-Step Diagnostic Procedure
-
Inspect footwell light LED module
-
Check footwell light connector
-
Test voltage at footwell light
-
Scan BCM for ambient light codes
Frequently Asked Questions
What are footwell lights?
Lights in the lower door area that illuminate the floor, providing ambient lighting and helping you see where to step.
Can I change the footwell light color?
On some vehicles with configurable ambient lighting, yes, through the infotainment system.
Are they standard on all vehicles?
More common on mid-range and luxury vehicles. Many economy vehicles do not include them.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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