B0401
M Collation NG
B0401 is an OBD-II diagnostic trouble code meaning: M Collation NG. Common causes: open circuit of the passive safety system, wiring harness damage. Estimated repair cost: $56–222.
Symptoms
- The passive safety system fault indicator is on
- Disabling one or more airbags
- Error message on display
Causes
- Open circuit of the passive safety system
- Wiring harness damage
- Squib malfunction
- Contact corrosion
- Problems with the restraint control module
How to Fix
- Conduct diagnostics of the passive safety system
- Check the integrity of the wiring harness
- Inspect contacts and connections for corrosion
- Replace faulty components (squibs, airbags, etc.)
- Reset the error and check the system operation
Related codes
Error B0401 by Vehicle Brand
FAQ
What does the B0401 code mean?
B0401 is an OBD-II diagnostic trouble code that indicates: M Collation NG
What causes a B0401 error code?
The most common causes of B0401 include: Open circuit of the passive safety system; Wiring harness damage; Squib malfunction; Contact corrosion.
How do I fix a B0401 diagnostic trouble code?
To fix B0401: Conduct diagnostics of the passive safety system. Check the integrity of the wiring harness. Inspect contacts and connections for corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B0401?
Do not drive — repair immediately
How much does it cost to fix B0401?
The estimated repair cost for B0401 is $56–222. Actual cost depends on your vehicle, location, and labor rates.
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