Body, generic

B00C0 Passenger Seat Occupant Classification Sensor A

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B00C0 flags the first of up to five classification inputs in the front passenger seat. Their job comes from FMVSS 208: the passenger bag must stay off when a 12-month dummy sits in a listed child restraint or a newborn dummy lies in a car bed, yet it must be live for a 5th percentile woman, and a yellow PASSENGER AIR BAG OFF lamp reports the suppressed state. Honda's 2013 Fit shows a typical weight solution: sensors in the seat switch the bag off at 29 kg or less, the off lamp may flicker when the load sits near that limit, and bags hanging from the seat back or a rear passenger pushing on it can upset the reading. No carmaker publishes B00C0, and which sensor the letter A names is left open. The airbag lamp lights and classification falls back to a safe default.

Likely causes

Loose plug or chafed wire to input A under the passenger seat, often after the seat was removed
Classification sensor A itself delivers no or an implausible signal
Objects under the seat, items hanging on the seat back or pressure from the rear disturbing the measurement

Symptoms

  • Airbag warning lamp on
  • Passenger airbag off lamp shows a state that does not match the occupant
  • Safety note: passenger airbag may be wrongly enabled or disabled; seat and sensor plugs only de-energised, recalibrate the classification after repairs, 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

passenger classification sensor asrs seat wiringoccupant classification module

Related codes

B00C1B00C2B00A0B00D5B00B0

References: law.cornell.edu, honda.ca.