B00B1Driver Seat Occupant Classification Sensor B
- Generic OBD-II code · Body
- How the car detects it
- B00B1 marks the second of the five driver seat classification sensors. No carmaker documents it publicly, and the letter is not tied to a fixed spot. Seat weight systems often measure at the corners: a CTS patent puts one thick-film strain gauge sensor at each corner between seat pan and slide rail, so the occupant's whole weight passes through four bridges whose leads meet in one junction box before the airbag controller. In such a layout every corner could carry its own letter, which would explain a series from A onward, yet no public source confirms that order. A stored B00B1 therefore means one load input is open, out of range or implausible; seat bolts fitted with the wrong torque and harness strain after seat removal are typical suspects. The airbag lamp lights.
- What you may notice
- Airbag warning lamp on
- Weight-based adjustment of the driver airbag unavailable
- Safety note: airbag system; work on seat and sensor plugs only de-energised; calibrate the seat sensors after replacement or seat refitting, specialist workshop only
- Likely causes
- LikelySeat refitted with wrong bolt torque or distorted mounting, loading the sensor unevenly
- PossibleStrained or chafed lead to load input B under the seat
- PossibleInternal fault of the strain gauge sensor
- 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.