B009A
Left Side Restraints Sensor 4
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
- Check the left side restraints sensor 4 connector
- Test the left side sensor 4 circuit for an open or a short
- Inspect the left side sensor 4 mount for damage
- Measure the left side sensor 4 signal against its range
- Replace the left side restraints sensor 4 only if the circuit tests good
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.