B0030
Driver Side Curtain Airbag Stage 2
The SRS module has detected a fault in the driver-side curtain airbag stage 2 deployment circuit. Two-stage curtain airbags use a second charge for severe lateral impacts.
- 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.
- Stage 2 squib circuit open or shortedCommon
- Roof rail connector loosePossible
Parts involved
- Curtain Airbag Module
- Srs Control Module
- Srs Wiring
B0030 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.