OBD Codes List

Diagnostic reference · B00B9

B00B9

Driver Seat Occupant Position Sensor C

System
Body control (B code)
Lamp
Airbag Light
Category
Body

What it means

B00B9 means Driver Seat Occupant Position Sensor C.

Where it lives

For B00B9, the part to look at first is the sensor named here.

Check these first

  • A failed driver seat occupant position sensor C
  • An open in the sensor C circuit
  • Corrosion at the driver occupant position sensor C connector
  • A sensor C out of calibration
  • A restraint control module fault on the sensor C input

What to do next

  1. Check the driver seat occupant position sensor C connector
  2. Test the sensor C circuit for an open or a short
  3. Inspect the sensor C mount under the seat
  4. Measure the sensor C position signal with a scan tool
  5. Replace the driver occupant position sensor C only if the circuit tests good
  6. Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.