B0055Second Row Right Seat Belt Sensor
- Generic OBD-II code · Body
- How the car detects it
- B0055 stands for the buckle sensor of the right seat in the second row, behind the front passenger and in vans often beside the sliding door. Where that seat is a removable captain's chair, a disconnect in the buckle lead is unavoidable; IEE points out in a patent that a wireless buckle sensor alone cannot tell the module whether the seat is fitted, so a missing signal may mean a fault or simply an empty floor. A seat refitted with its plug left open is therefore a common trigger. CTS supplies non-contact Hall buckle switches for such uses. The rear belt warning of FMVSS 208, section S7.5(c), applies to this seat for vehicles made after 1 September 2028. No carmaker documents B0055 publicly; the Mitsubishi passenger code B0052 is the nearest documented model.
- What you may notice
- Airbag or rear belt warning lamp on
- Right rear seat shown wrongly or missing in the belt status display
- Safety note: seat and buckle plugs under the seat lie near pretensioner and side airbag lines; only unplug them with the battery disconnected and the wait time observed
- Likely causes
- LikelySeat connector not engaged after the removable seat was refitted
- PossibleCorroded buckle connector, e.g. from wet floor near the sliding door
- PossibleFaulty sensor in the right rear buckle
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €60 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.