B00C8: Passenger Seat Occupant Position Sensor "B" (Subfault)

What it means

The restraint module monitors passenger-seat occupant position sensor B as part of its assessment of the occupant’s position. It sets this code when the sensor’s signal or circuit does not meet the module’s expected criteria.

At a glance

• Usually lights the airbag (SRS) or body-system warning light

How it works

Passenger occupant position sensor B supplies one of the passenger-seat position inputs used by the restraint control module. B00C8 points specifically to sensor B or its circuit: the module has detected a missing or unacceptable signal and may not be able to rely on that input.

Common causes

Most likely first.

1. Failed occupant position sensor
2. Loose or damaged connector or wiring
3. Open or short in the sensor circuit
4. Fault in the restraint control module

Symptoms

• Warning light or symbol related to the affected system
• Comfort or safety function impaired

How to diagnose it

1. Confirm B00C8 with an SRS-capable scan tool, save freeze-frame data, and note any codes that identify sensor B or a shared supply circuit.
2. Review live data for passenger occupant position sensor B and check whether it changes as expected under the manufacturer’s specified conditions.
3. Inspect sensor B’s connector and wiring for pulled pins, corrosion, pinching, or rubbing beneath the passenger seat.
4. Use the manufacturer’s SRS isolation procedure before testing sensor B’s circuit for opens, shorts, power, ground, and signal continuity.
5. Compare sensor B’s measured output with the manufacturer’s specification and distinguish a sensor failure from a harness fault.
6. If those checks pass, inspect restraint-module connections and power and ground before concluding the module has failed.

Common fixes

• Reseat or repair the passenger occupant position sensor B connector or damaged wiring.
• Repair an open or short isolated to sensor B’s circuit.
• Replace sensor B when its output does not meet the manufacturer’s specification.
• Repair a verified restraint-module feed, ground, or connector fault.
• Replace or reprogram the restraint control module only after circuit and sensor tests point to it.

Can I keep driving?

The vehicle may be driveable, but the restraint system may not have reliable passenger-position information from sensor B. Avoid working around the seat wiring and get the SRS fault diagnosed promptly, since airbag behavior could be affected.