B00B2Driver Seat Occupant Classification Sensor C
- Generic OBD-II code · Body
- How the car detects it
- B00B2 is the third driver seat classification sensor in the J2012 list. No carmaker documents the code publicly. A widely used sensor type is Bosch's iBolt: the four bolts that anchor the seat frame are swapped for sensor bolts, a magnet and Hall element register how far a bending beam deflects, and the unit derives weight and how it is spread, separating an empty seat, a one-year-old, children of three and six, a 5th percentile woman and a 50th percentile man. A Bosch patent adds an accelerometer in the seat back that freezes the classification while jolts would distort the bolts' readings. Which bolt the letter C would denote is not published. With B00B2 stored, the airbag lamp is on and adaptive deployment cannot rely on that input.
- What you may notice
- Airbag warning lamp on
- Driver airbag cannot be matched to occupant size
- Safety note: airbag system; disconnect seat and sensor plugs only de-energised (ignition off, battery off, wait time); calibrate weight sensors after replacement, specialist workshop only
- Likely causes
- PossibleInternal fault of the Hall-type sensor bolt at seat anchor C
- PossibleSensor bolt overloaded or seat frame bent, e.g. after a crash or wrong torque
- PossibleOpen or poor contact in the lead to input C
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.