OBD-II code · Body
B0084 Driver Belt Buckle Switch Circuit
The SRS module has detected a fault in the driver belt buckle switch circuit. The fastened-state of the seat belt cannot be reliably read — affects belt warning and airbag deployment logic.
Is it safe to drive with B0084?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyBuckle switch failed
- PossibleWiring under seat open
Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–2.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Seat Belt Buckle Switch, Srs Control Module, Srs Wiring
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.