B0004
Driver Frontal Deployment Loop Resistance High
The SRS module measured a higher than expected resistance in the driver frontal airbag deployment circuit. Causes include a partially open connection, corroded contacts, or a damaged clock spring conductor.
- 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.
- Clock spring conductor partially wornCommon
- Oxidized airbag connector pinsPossible
- Driver airbag module internal faultLess likely
Parts involved
- Driver Airbag Module
- Clock Spring
- Srs Wiring
B0004 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.