Body, generic

B00B7 Driver Seat Occupant Position Sensor A

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B00B7 is the first of five occupant position sensors for the driver seat. No carmaker publishes the code, and J2012 does not say which sensor the letter A means. Position sensing serves the DASS route of FMVSS 208, which also exists for the driver: the driver bag must already be suppressed when a test dummy's head, neck or chest moves into a zone next to the cover that the maker defines. Ultrasound is one way to watch that zone; an Automotive Systems Laboratory patent crosses beams from transmitters in the headliner about eight inches in front of the airbag door, asks for an update within 10 ms and treats any undiagnosed fault as a reason to disable the bag. A stored B00B7 therefore means the module has lost this view and the airbag lamp is on.

Likely causes

Open or poor contact in the lead to position sensor A (e.g. headliner or trim harness)
Sensor face covered, dirty or misaligned after trim work
Internal fault of position sensor A

Symptoms

  • Airbag warning lamp on
  • Out-of-position suppression of the driver airbag unavailable
  • Safety note: airbag system; disconnect sensor and seat plugs only de-energised (ignition off, battery off, wait time); calibrate/initialise position sensors 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 asrs wiringsrs control module

Related codes

B00B8B00B9B00BAB00BBB00A1

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