Faulty passenger seat occupant position sensor B; Damaged or chafed wiring harness under the passenger seat; Loose or corroded electrical connector at the sensor or module; Failed occupant detection module or body control module; Seat track obstruction or mechanical binding affecting sensor movement; Water intrusion or debris in the seat connector area

DTC codes / B00xx · Airbags, seats, doors, lights and comfort systems / B00C8

B00C8Passenger Seat Occupant Position Sensor B

Q: What does code B00C8 mean?

Passenger Seat Occupant Position Sensor B. B00C8 indicates that the body control module or occupant detection module has detected a fault in the passenger seat occupant position sensor circuit, specifically the 'B' sensor. The computer monitors the sensor's signal voltage and sets this code when the reading falls outside the expected range or the circuit has an open, short, or erratic signal.

B00C8 indicates that the body control module or occupant detection module has detected a fault in the passenger seat occupant position sensor circuit, specifically the 'B' sensor. The computer monitors the sensor's signal voltage and sets this code when the reading falls outside the expected range or the circuit has an open, short, or erratic signal.

SystemBody

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaAirbags, seats, doors, lights and comfort systems

Symptoms you may notice

Airbag warning light illuminated on the dashboard
Passenger airbag may be automatically disabled even with an adult seated
Passenger seatbelt reminder chime may not activate
Inconsistent or no response from the passenger seat position sensor during diagnostics
Often no symptoms besides the warning light

Common causes, most likely first

Faulty passenger seat occupant position sensor B
Damaged or chafed wiring harness under the passenger seat
Loose or corroded electrical connector at the sensor or module
Failed occupant detection module or body control module
Seat track obstruction or mechanical binding affecting sensor movement
Water intrusion or debris in the seat connector area

How to diagnose and fix it

Inspect the passenger seat wiring harness and connectors for damage, corrosion, or loose pins
Check the sensor mounting and seat track for physical obstructions or binding
Measure sensor resistance and voltage with a multimeter and compare to manufacturer specifications
Perform a calibration or relearn procedure for the occupant detection system using a scan tool
Replace the passenger seat occupant position sensor B if tests confirm it is faulty
Repair or replace damaged wiring and connectors as needed
Clear the code and verify the repair by cycling the ignition and checking for return of the fault

What Most Techs Miss on B00C8

A weak or failing battery can cause erratic sensor signals and set this code without any sensor fault, so always check battery health first.
The occupant position sensor often shares a connector with the seatbelt buckle and weight sensor, so corrosion in one pin can affect multiple systems.
After replacing the sensor or module, a calibration procedure is usually required; skipping it will cause the code to reset immediately.
Seat covers or heavy objects left on the passenger seat can interfere with sensor operation and trigger false codes.
This code can be set by a faulty passenger seat weight sensor even though the definition points to position sensor B, so verify which sensor is actually reporting.

Can I keep driving with B00C8?

The vehicle is generally safe to drive, but the passenger airbag may not deploy correctly in a crash, so avoid carrying passengers in the front seat until the fault is repaired. Have the system diagnosed promptly to restore full safety functionality.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.