B00B2

What it means

B00B2 is a generic body code meaning the restraint control module has logged a fault with Driver Seat Occupant Classification Sensor C. The module monitors this sensor to decide whether the seat is occupied and how the driver's airbag should respond. It sets the code when the signal, circuit or sensor data is outside expected limits or missing. The exact sensor layout and the type of fault flagged vary by make and model.

Symptoms

• Airbag or SRS warning light on
• Driver airbag status or occupancy indicator showing wrongly or not working
• Seat belt reminder warning behaving erratically or not at all
• Fault appearing intermittently, often after the seat has been moved or someone has sat heavily on it
• Other restraint system codes stored alongside it

Possible causes

• Damaged, chafed or pinched wiring under the driver seat, often from seat movementlikely
• Corroded, loose or poorly seated connector at the seat sensor or underseat SRS pluglikely
• Faulty occupant classification sensor or sensor matpossible
• Objects, aftermarket seat covers, seat heaters or cushions interfering with the sensorpossible
• Seat has been removed or refitted without the sensor being correctly reconnected or recalibrated (procedure is model-specific)possible
• Faulty restraint control module or occupant classification modulerare
• Low battery voltage or a power supply fault causing a false sensor errorrare

How to diagnose

1. Read all stored codes and freeze frame data, noting whether B00B2 is current or historic and whether other SRS or seat codes are present.
2. Check for aftermarket seat covers, cushions, heaters, items under the seat or recent seat work that could disturb the sensor.
3. Visually inspect the wiring and connectors under the driver seat for damage, chafing, water ingress, corrosion or loose fit.
4. Check battery condition and charging voltage, as low voltage can set false SRS faults.
5. Follow the manufacturer's SRS safety procedure (isolate the battery and wait the stated time) before unplugging any restraint connector, and never probe airbag circuits with a test lamp.
6. Check the sensor circuit resistance and continuity against manufacturer data, and view live sensor data while moving the seat and applying load.
7. Clear the code, then road test or cycle the seat position and recheck for return of the fault.
8. If wiring and sensor test fine, check for service information on module faults or required calibration for your model.

How to fix

• Repair or replace damaged wiring and secure it so it cannot be pinched by seat movement.
• Clean, reseat or replace corroded or loose connectors.
• Replace the faulty occupant classification sensor or seat assembly, as the manufacturer specifies for the model.
• Remove any interfering covers or items and refit the seat and sensor correctly.
• Carry out any required occupant sensor zeroing or calibration after seat work or part replacement, using the manufacturer's procedure.
• Replace the restraint control module only after all wiring and sensor faults have been ruled out and the manufacturer's procedure has been followed.

Can I keep driving?

Nearby codes

• B00B1GenericDriver Seat Occupant Classification Sensor B
• B00B3GenericDriver Seat Occupant Classification Sensor D