B0074Second Row Center Seat Belt Pretensioner Deployment Control
- Generic OBD-II code · Body
- How the car detects it
- B0074 would flag the firing loop of a pretensioner at the second row's middle seat. Rear centre belts with their own pretensioner are rare; IIHS rear-seat tests concentrate on the outboard positions, and no carmaker publishes B0074 with the J2012 meaning. The code is common in GM vehicles, but with an older meaning: the 2011 Saab 9-4X sets B0074 00/04 when the passenger presence module loses its seat sensor mat, GM's Impala bulletin PIE0485A (2015–2018) covers B0074-0D, and campaign N182188910 for the 2017 Buick Verano ties B0074 0D/0E to a pinched presence sensor wire that suppresses the passenger airbag. In a GM vehicle, B0074 therefore points to the front passenger seat sensing, not a rear belt. Where the code does mean a rear centre pretensioner, the airbag lamp is on and that unit is inactive.
- What you may notice
- Airbag warning lamp on
- On GM vehicles also passenger airbag status shows OFF with an adult seated
- Safety note: restraint parts may be pyrotechnic or part of the airbag control; disconnect the battery, observe the wait time and use a specialist workshop
- Likely causes
- LikelyOn GM vehicles, fault in the passenger presence sensor mat or its pinched wire (older GM meaning)
- PossiblePlug of the rear centre pretensioner disturbed when the bench is folded or removed
- RareOpen or short in the harness to the rear centre seat
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €80 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.