Body, generic

B00B8 Driver Seat Occupant Position Sensor B

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B00B8 names the second occupant position sensor at the driver seat. The code is not published by any carmaker, and the letter assignment is the maker's choice. Instead of looking down from the roof, a position sensor can sit at the airbag cover itself: a patent first filed in 1998 by Automotive Systems Laboratory, now held by Joyson, puts an active infrared, ultrasonic or electric field sensor in or near the inflator door, keeps the bag disabled while a large body part is in the at-risk zone and cites NHTSA findings that injuries drop if the bag stays off for occupants roughly 4 to 10 inches from the door. FMVSS 208 accepts such dynamic suppression for the driver bag. A stored B00B8 means this input has failed; the airbag lamp lights.

Likely causes

Fault in the lead to a sensor at the steering wheel or cover, e.g. via the clockspring
Sensor window covered by stickers, covers or dirt
Internal fault of position sensor B

Symptoms

  • Airbag warning lamp on
  • Airbag cannot be suppressed if the driver is very close to the cover
  • Safety note: airbag system; work at steering wheel, cover or sensor plugs only de-energised (ignition off, battery off, wait time); calibrate the sensor after replacement, specialist workshop only

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€80–800
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

driver occupant position sensor bsrs wiringsrs control module

Related codes

B00B7B00B9B00BAB00BBB00A1

References: patents.google.com, law.cornell.edu.