B0001Driver Frontal Stage 1 Deployment Control
- Generic OBD-II code · Body
- How the car detects it
- The restraint control module tests the firing loop of the first inflator stage in the driver airbag, which sits in the steering wheel hub and is fed through the clock spring. B0001 is stored when that loop is open, shorted or outside its resistance window; the fault byte added to the code names the exact type. Mercedes-Benz logs B000113 for an open stage 1 squib, Honda used B0001-13 on the 2013 Civic, Mitsubishi files it under the driver airbag module, FCA under squib 1, and GM on its 2020-21 full-size trucks, where B0001-1B came from rust particles at the airbag connector raising the resistance (bulletin 21-NA-005). Stage 1 is the charge used in every deployment, so a fault here can cost the driver frontal protection. The airbag warning lamp stays lit.
- What you may notice
- Airbag warning lamp or service airbag message stays on
- Driver frontal airbag may not deploy in a crash
- Safety note: do not probe the airbag circuit yourself; unplug airbag connectors only with the battery disconnected and the stated wait time observed
- Likely causes
- LikelyCorroded or poorly seated connector between steering wheel harness and airbag module
- PossibleBroken or worn conductor in the clock spring
- PossibleInternal fault in the driver airbag module (stage 1 squib)
- RareChafed lead in the steering wheel or column harness
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €150 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.