B0050Driver Seat Belt Sensor
- Generic OBD-II code · Body
- How the car detects it
- B0050 monitors the switch in the driver's belt buckle that tells the restraint module whether the belt is latched; the module uses it for the belt reminder and for choosing the airbag and pretensioner response. Usually a two-wire Hall sensor whose current changes when the steel tongue enters the buckle. FCA documents B0050 with this wording: its 2016-17 parts notes for the Dart, Cherokee and Chrysler 200 list B0050-13 as an open circuit of the driver belt sensor, and TSB 10-001-23 for the 2015-22 Renegade and Fiat 500X lists B0050-13 and B0050-1D (out of range), traced to terminal corrosion at the inline buckle connector under the seat. Mitsubishi uses B0052 for the passenger buckle. The airbag lamp lights.
- What you may notice
- Airbag warning lamp on
- Belt reminder for the driver may warn wrongly or stay silent
- Restraint module may treat the driver as unbelted and adapt airbag and pretensioner firing
- Safety note: the buckle connector sits under the seat next to the side airbag and pretensioner plugs; disconnect the battery and observe the wait time before unplugging anything
- Likely causes
- LikelyCorroded terminals at the inline connector between buckle and seat harness
- PossibleFaulty Hall sensor or switch inside the driver buckle
- PossibleBuckle lead pinched or stretched by the seat track
- RareForeign object or debris in the buckle confusing the sensor
- 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.