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Thread: Airbag Occupancy Sensor Malfunction

  1. #1
    Join Date
    Nov 2022
    Location
    Socal
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    My Cars
    2016 BMW 435i convert

    Airbag Occupancy Sensor Malfunction

    Last month, due to lose bottle cap, water spilled on the passenger seat and right after that Airbag light came up. The original error was Passenger side Restraining system Malfunction. I looked at the codes and it all points to the Capacitive (Mat) Occupancy sensor. I checked all the fuses and and also tried disconnecting the sensor but no luck.
    Anyone has this issue please share how did you fix it?

    Thanks in advance
    Hark

  2. #2
    Join Date
    Jul 2004
    Location
    Houston, TX
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    11,754
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    36 Cylinders
    What is the actual error? Error code and the description.
    -Abel

    - E36 328is ~210-220whp: Lots of Mods.
    - 2000 Z3: Many Mods.
    - 2003 VW Jetta TDI Manual 47-50mpg
    - 1999 S52 Estoril M Coupe
    - 2014 328d Wagon, self-tuned, 270hp/430ft-lbs
    - 2019 M2 Competition, self-tuned, 504whp
    - 2016 Mini Cooper S

  3. #3
    Join Date
    Nov 2022
    Location
    Socal
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    2016 BMW 435i convert
    Thanks for your reply!
    Error on the dashboard is "passenger restraint system malfunction" with Airbag Red light On. Error code on the scanner are 930AC0 & 930A1C.

  4. #4
    Join Date
    Jul 2004
    Location
    Houston, TX
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    11,754
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    36 Cylinders
    0x930AC0 ODS-System: seat occupancy sensor Passenger: sending algorithm error
    0x930A1C ODS-System: seat occupancy sensor Passenger: sending sensor failure because of wetness

    The occupancy sensors on these cars work using a capacitative system, very similar to phone touchscreens. This also means that if the seat material is still wet, it will keep throwing a fault.
    There is a small black module connected to the seat occupancy sensor, check that area for wetness too.

    It may be that you have to dry out the leather/leatherette seats (and the sponge!) first before it will let you clear it.

    If you really want to get your hands dirty, then you can lift the upholstery and dry it, but that's a bit advanced.
    -Abel

    - E36 328is ~210-220whp: Lots of Mods.
    - 2000 Z3: Many Mods.
    - 2003 VW Jetta TDI Manual 47-50mpg
    - 1999 S52 Estoril M Coupe
    - 2014 328d Wagon, self-tuned, 270hp/430ft-lbs
    - 2019 M2 Competition, self-tuned, 504whp
    - 2016 Mini Cooper S

  5. #5
    Join Date
    Nov 2022
    Location
    Socal
    Posts
    3
    My Cars
    2016 BMW 435i convert
    Thank you very much. I will try to dry the area using heater under the seat.

  6. #6
    Join Date
    Dec 2019
    Location
    Pennsylvania
    Posts
    7
    My Cars
    1996 328is, 2016 328iX
    Same error after rain wet the seat. Small fun blowing under the seat, code cleared itself.

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