B00C4: Passenger Seat Occupant Classification Sensor "E" (Subfault)

What it means

The restraint module monitors passenger-seat occupant classification sensor E as part of its assessment of seat occupancy. It sets this code when the sensor’s signal or circuit does not meet the module’s expected criteria.

At a glance

• Usually lights the airbag (SRS) or body-system warning light

How it works

Passenger seat occupant classification sensor E contributes to the system's assessment of seat occupancy, which helps determine passenger-airbag status. B00C4 indicates that the restraint module has detected an out-of-criteria signal or circuit condition involving sensor E, but does not specify the exact fault.

Common causes

Most likely first.

1. Failed occupant classification sensor
2. Loose or damaged connector or wiring
3. Open or short in the sensor circuit
4. Fault in the restraint control module

Symptoms

• Warning light or symbol related to the affected system
• Comfort or safety function impaired

How to diagnose it

1. Read codes and freeze-frame data from the restraint and occupant-classification modules, then check live data for sensor E and the passenger-airbag indicator.
2. Clear objects from the passenger seat and check whether anything is trapped around the cushion that could interfere with sensor E.
3. Inspect the passenger seat cushion and upholstery for damage or modification, and check accessible sensor E wiring and connectors beneath the seat.
4. Use the manufacturer's occupancy-check procedure to compare sensor E data under the required seat conditions and note any missing or implausible response.
5. Test sensor E and its circuit against the manufacturer's specification; evaluate the classification or restraint module only if the sensor and wiring pass.

Common fixes

• Remove an obstruction affecting passenger seat sensor E.
• Repair damaged wiring or a poor connector in sensor E's circuit.
• Repair seat cushion or upholstery damage affecting the sensor according to the manufacturer's procedure.
• Replace sensor E or repair the classification or restraint module if diagnostic testing confirms the failure.

Can I keep driving?

Get the restraint system checked promptly because passenger-airbag status may be affected by incorrect seat classification. Follow the vehicle's passenger and child-seat instructions until the fault is resolved.