Body, generic

B00C6 Passenger Seat Recline Position Restraints Sensor

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B00C6 concerns the sensor that reports how far the passenger seat back is reclined. It appears neither in any public carmaker list nor in NHTSA bulletins. On the passenger side the angle matters mainly for classification, because a reclined back carries part of the occupant's weight. A patent filed in 1997 gives numbers: a cushion sensor read 42, 39 and 27 lb for a 60 lb child at three recline settings and 74, 64 and 49 lb for a 120 lb adult, so a recline sensor feeds a lookup table; there, below about 95 lb the bag is suppressed. A 2010 Delphi patent corrects bladder pressure with a backrest angle from an accelerometer or potentiometer. Without this input a small adult may be taken for a child. B00C6 lights the airbag lamp.

Likely causes

Lead to the recline sensor stretched or broken at the seat back hinge
Recline potentiometer or inclination sensor worn or faulty
Angle reference not learned after replacing the seat back or the sensor

Symptoms

  • Airbag warning lamp on
  • Passenger airbag off lamp may light for an adult sitting with the seat back reclined
  • Safety note: airbag system; work on seat back and sensor only de-energised (ignition off, battery off, wait time), relearn or calibrate afterwards, specialist workshop only

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€80–600
Time0.5–3 h

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

Parts involved

passenger recline sensorsrs seat wiringoccupant classification module

Related codes

B00B6B00C5B00A0

References: patents.google.com, patents.google.com.