B0061Passenger Seat Belt Tension Sensor
- Generic OBD-II code · Body
- How the car detects it
- B0061 covers the belt tension sensor of the front passenger seat, a key input for passenger occupant classification. FMVSS 208 lets carmakers meet the child-seat rules for advanced airbags by fitting a system that automatically switches the passenger airbag off for small occupants. A child seat strapped in tightly presses into the cushion and can look as heavy as an adult on the weight sensor; the tension sensor exposes that. Delphi's patent lets the occupant module subtract belt load from seat weight and suppress the airbag above a calibrated pull of about 30 lb, and the sensor reports out-of-range values as faults. No carmaker documents B0061 publicly with this meaning. Saab 9-3 modules use it for a low driver curtain loop resistance.
- What you may notice
- Airbag warning lamp on
- Passenger airbag status indicator may show an unexpected on or off state
- A tightly fastened child seat may not be recognised reliably
- Safety note: the sensor plug sits beside the passenger seat near airbag and pretensioner plugs; only unplug it with the battery disconnected and the wait time observed
- Likely causes
- LikelyLoose or corroded plug at the passenger belt tension sensor
- PossibleTension sensor reading out of range or stuck
- RareInput fault in the occupant classification or airbag module
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €80 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.