Airbags

B00B2 — Driver Seat Occupant Classification Sensor C Fault

Severity: medium Safe to drive

What B00B2 means

The airbag (SRS) control module reads occupant classification sensors in the seat to tell whether it is occupied and how restraints should respond. B00B2 means the signal from driver seat sensor C is out of range or missing. The module cannot trust the data and may limit airbag operation.

Symptoms

  • Airbag or SRS warning light on
  • Driver occupant detection errors
  • Possible disabling of airbag deployment logic
  • Code returns after being cleared

Possible causes

  1. Faulty occupant classification sensor C in the seat
  2. Open or short in the sensor wiring
  3. Poor connection or corrosion at the connector under the seat
  4. Harness damaged by seat movement
  5. Faulty SRS control module (uncommon)

How to diagnose

  1. Scan all modules with an SRS-capable tool and record the data
  2. Inspect the connectors and harness under the driver seat for damage or moisture
  3. Check for objects, seat covers or aftermarket heaters that could interfere with the sensor
  4. Test the circuit for opens, shorts and resistance using the factory wiring diagram
  5. View live sensor data with and without load on the seat
  6. Clear the code and see if it returns when wiggling the harness
  7. If wiring and sensor test good, evaluate the SRS module

Common fixes

  • Replace occupant classification sensor C or the seat assembly that includes it
  • Repair the wiring and connectors, cleaning the terminals
  • Replace the SRS control module if confirmed faulty
  • Perform any calibration or relearn the manufacturer requires after repair

Questions and answers

What does B00B2 mean?

The SRS module detected a fault in driver seat occupant classification sensor C. The system may then misjudge whether the seat is occupied.

Can I drive with B00B2?

Yes, the car will drive normally. However, driver protection in a crash may be compromised, so get it diagnosed soon.

Can I just clear the code?

Clearing it only turns off the light temporarily. If the cause remains, the code returns and the airbag may stay limited.

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.