Body, generic

B00B4 Driver Seat Occupant Classification Sensor E

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B00B4 is the fifth and last driver seat classification sensor. No carmaker documents the code publicly. A fifth input need not weigh anything: IEE's BodySense uses capacitive sensing in the seat surface, placed over the heater mat, under the cover and on top of the foam, and tells a child restraint from a seated person whatever the belt tension, posture, weight or height; IEE says the vehicle maker does not have to calibrate it and that it serves the FMVSS 208 advanced airbag rules. Other designs add a belt tension sensor so that a tightly cinched child seat is not taken for a heavy adult. Whether E stands for such a field sensor, a mat or another load cell is the maker's decision. When B00B4 is stored, the airbag lamp is lit and that input is ignored.

Likely causes

Open or poor contact in the seat harness or plug to input E
Damaged seat heater or trim where the capacitive electrode shares its layer
Internal fault of the fifth classification sensor or its electronics

Symptoms

  • Airbag warning lamp on
  • Possible related faults of the seat heater on the same seat
  • Safety note: airbag system; work on seat and sensor plugs only de-energised; after replacing a sensor or trim follow the maker's calibration, specialist workshop only

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€80–900
Time0.5–3 h

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

Parts involved

driver classification sensor esrs seat wiringsrs control module

Related codes

B00B3B00B2B00B1B00B0B00A0

References: iee-sensing.com, iee-sensing.com, patents.google.com.