B0128
Passenger Occupant Detection System Malfunction
The passenger occupant detection system (ODS), used to enable/disable the passenger airbag based on weight, has reported a malfunction.
- Check engine light: Not always
- Emissions related: No
- Repair difficulty: hard
Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
Common causes
Ordered by how often each turns out to be the cause.
- Seat sensor mat failureCommon
- ODS calibration lost after seat workPossible
- Loose ODS connectorPossible
Parts involved
- Occupant Detection Sensor
- Passenger Seat
- Srs Control Module
B0128 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.