Fault Code B0042
Code meaning, symptoms, possible causes, part number, and estimated cost.
B0042
Passenger Seat Belt Sensor
This DTC indicates an issue with the passenger's seat belt sensor. This sensor detects whether the seat belt is buckled and affects the SRS system's operation. A fault in it can trigger a warning light and disrupt safety system function. System check at a qualified garage is recommended.
Part Details
Part Name
Seat Belt Sensor - Passenger Side
Reference P/N (OEM)
N/A
General part number for this fault code — not necessarily for your specific vehicle
Estimated Cost
₪300 - ₪900
Engine Location
Seat belt buckle on the passenger's seat
Symptoms
- SRS/Airbag warning light on
- Seat belt chime despite being buckled (with occupant)
- Seat belt warning light on despite being buckled
- DTC stored in ECU memory
Possible Causes
- 1Internal buckle sensor fault
- 2Damaged wiring or short circuit to sensor
- 3Loose or disconnected connector
- 4Dirt or foreign object inside the buckle
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