Airbags

B009C — Left Side Restraint Sensor 6 Circuit Fault

Severity: medium Safe to drive

What B009C means

The airbag (SRS) control module constantly monitors the impact and pressure sensors on the left side of the vehicle. B009C is set when the signal from left side restraint sensor 6 is out of range or its circuit is faulty. It is usually a subfault, and the exact sensor location depends on the vehicle make and model.

Symptoms

  • Airbag (SRS) warning light on or flashing
  • Restraint system malfunction message
  • Possible loss of left side impact sensing
  • B009C stored in the SRS module

Possible causes

  1. Faulty left side restraint sensor (impact or pressure type)
  2. Damaged wiring or a poor connection in the sensor circuit
  3. Corrosion or loose terminals after water intrusion, body work or trim removal
  4. Faulty airbag control module (less likely)

How to diagnose

  1. Scan all SRS codes with a scan tool that supports airbags and note any related codes
  2. Find the location of left side sensor 6 using the vehicle's wiring diagram
  3. Inspect the sensor, its mounting and harness for impact damage, corrosion, moisture or chafing
  4. Disconnect the battery and wait the time given in the service manual, then check the sensor and SRS module connectors
  5. Test the sensor circuit for opens, shorts to ground and shorts to power per factory specs
  6. Check live sensor data if the scan tool supports it
  7. Clear the code and see whether it returns

Common fixes

  • Repair the wiring and connectors of the left sensor circuit
  • Replace the left side restraint sensor
  • Replace the airbag control module if it is confirmed faulty

Questions and answers

Is it safe to drive with B009C?

Yes, the car will drive normally. But side-impact protection may be reduced, so get it checked soon.

Can I just clear B009C myself?

You can clear it with a scan tool, but it will return if the cause remains. Airbag work is hazardous, so disconnect the battery and follow the manufacturer's procedure.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.