B001ACenter Frontal Stage 3 Deployment Control
- Generic OBD-II code · Body
- How the car detects it
- B001A closes the first-row center frontal series and stands for a third stage of a middle-seat frontal airbag, matching B0003 for the driver and B0012 for the passenger. No carmaker documents it publicly in this sense. At General Motors the number belongs to the anchor-mounted belt pretensioner on the driver side, a second pretensioner at the belt end fitting that works next to the retractor unit coded B0015. Its limits match the other GM squib loops: a pretensioner loop reading beyond 4.2 ohms or beneath 1.4 ohms for two seconds sets the code, as do shorts and opens. GM bulletins report it on the 2009-11 Impala with a pinched or misrouted pretensioner harness (PIC5396A, 15-NA-074) and on Equinox and Traverse 2018 (PIE0438). On GM vehicles look at the lower belt anchor first. The airbag lamp is on.
- What you may notice
- Airbag warning lamp on
- On GM the driver anchor pretensioner may not fire
- 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
- LikelyOn GM vehicles pinched, misrouted or corroded anchor pretensioner harness
- RareFault in the third stage loop of a first-row center frontal airbag (J2012 meaning)
- RareInternal fault in the pretensioner
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €80 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.