B0042
Side Deployment Loop Open (Generic)
A generic open-circuit fault has been reported in a side airbag deployment loop. Refer to vehicle service data to determine the affected side and stage.
- 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.
- Disconnected seat connectorCommon
- Broken wire in seat harnessPossible
Parts involved
- Side Airbag
- Srs Seat Wiring
B0042 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.