B0200
Air Bag System Voltage Out of Range
The SRS module has detected that its supply voltage is outside the operating range, preventing reliable deployment readiness.
- Check engine light: Not always
- Emissions related: No
- Repair difficulty: medium
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.
- Weak or failing vehicle batteryCommon
- Alternator output low or unstablePossible
- Damaged SRS power wiringPossible
Parts involved
- Srs Control Module
- Vehicle Battery
- Srs Power Circuit
B0200 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.