B0040
Third Row Left Side Airbag Deployment Control
B0040 is an OBD-II diagnostic trouble code meaning: Third Row Left Side Airbag Deployment Control. Common causes: open or short circuit in wiring harness, faulty airbag squib. Estimated repair cost: $56–167.
Symptoms
- Airbag light is on
- Third row airbag does not deploy in crash
- Error persists after scanning
Causes
- Open or short circuit in wiring harness
- Faulty airbag squib
- Problems with the airbag control unit
- Contact corrosion
How to Fix
- Check the wiring harness for opens and shorts
- Check squib resistance
- Inspect contacts for corrosion
- Scan the control unit for additional errors
- Replace faulty components
Related codes
Error B0040 by Vehicle Brand
FAQ
What does the B0040 code mean?
B0040 is an OBD-II diagnostic trouble code that indicates: Third Row Left Side Airbag Deployment Control
What causes a B0040 error code?
The most common causes of B0040 include: Open or short circuit in wiring harness; Faulty airbag squib; Problems with the airbag control unit; Contact corrosion.
How do I fix a B0040 diagnostic trouble code?
To fix B0040: Check the wiring harness for opens and shorts. Check squib resistance. Inspect contacts for corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B0040?
Limited driving only, diagnose soon
How much does it cost to fix B0040?
The estimated repair cost for B0040 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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