OBD Codes List

Diagnostic reference · B009A

B009A

Left Side Restraints Sensor 4

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

What it means

B009A means Left Side Restraints Sensor 4.

Where it lives

For B009A, start at the sensor the description names.

Check these first

  • A failed left side restraints sensor 4
  • An open in the left side sensor 4 circuit
  • Corrosion at the left side sensor 4 connector
  • A left side sensor 4 that reads out of range
  • A restraint control module fault on the left side sensor 4 input

What to do next

  1. Check the left side restraints sensor 4 connector
  2. Test the left side sensor 4 circuit for an open or a short
  3. Inspect the left side sensor 4 mount for damage
  4. Measure the left side sensor 4 signal against its range
  5. Replace the left side restraints sensor 4 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.