OBD Codes List

Diagnostic reference · B00A1

B00A1

Occupant Position System

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

What it means

B00A1 means Occupant Position System.

Check these first

  • A failed occupant position sensor under the front seat
  • A wiring fault in the occupant position system circuit
  • Corrosion or water damage at the occupant position connector
  • A seat position sensor that reads out of range
  • A restraint control module fault on the occupant position input

What to do next

  1. Check the occupant position sensor connectors for corrosion
  2. Test the occupant position system wiring for opens and shorts
  3. Inspect the seat position sensor mount under the seat
  4. Measure the occupant position signal with a scan tool
  5. Replace the occupant position sensor 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.