OBD-II code · Body
B0099 Occupant Detection Module Internal Fault
The occupant detection module reports an internal fault detected by self-test. The module typically processes seat sensor data and reports occupancy status to the SRS module.
Is it safe to drive with B0099?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyOccupant detection module internal fault
- PossiblePower supply or ground fault to module
Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Occupant Detection Module, Srs Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.