Fault Code B0040
Code meaning, symptoms, possible causes, part number, and estimated cost.
B0040
Passenger Occupant Detection System
This DTC indicates an issue with the passenger occupant detection system. This system determines if and how to deploy the airbag based on the occupant's weight and size. A fault in it can prevent airbag deployment or cause incorrect deployment. System check at a qualified garage is recommended.
Part Details
Part Name
Occupant Detection System - Passenger Seat
Reference P/N (OEM)
N/A
General part number for this fault code — not necessarily for your specific vehicle
Estimated Cost
₪400 - ₪1200
Engine Location
Front passenger seat
Symptoms
- SRS/Airbag warning light on
- 'Passenger Airbag Off' light on despite occupant presence
- Incorrect seat occupancy indication
- DTC stored in ECU memory
Possible Causes
- 1Faulty weight sensor in seat
- 2Damaged wiring or short circuit to sensor
- 3Foreign object on the seat
- 4Incorrect system calibration
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