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Thread: PO445 & 446 code on M Roadster

  1. #1
    Join Date
    Oct 2018
    Location
    Surfside, Fl
    Posts
    55
    My Cars
    1998 BMW Z3M Raodster

    PO445 & 446 code on M Roadster

    Hello,
    My check engine light came on today. Connected code reader and came up with PO445 & PO446 fault codes. Looks like the fault is associated with the emission system of the car. Has anyone experienced the same faults on their roadster? If anyone can point me to how to go about correcting that issue would be greatly appreciated.
    **Interestingly, I was stopped at a traffic light (car in neutral) and I felt the rpm dip momentarily and that triggered the check engine light to come on. Otherwise, the car runs perfectly normal.
    As always, thanks to the community for being an invaluable resource!

  2. #2
    Join Date
    Jul 2004
    Location
    Houston, TX
    Posts
    12,459
    My Cars
    36 Cylinders
    https://www.fcpeuro.com/products/bmw...ve-13901744150

    This valve is likely shorting out. It is found around your intake manifold.
    -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
    Oct 2018
    Location
    Surfside, Fl
    Posts
    55
    My Cars
    1998 BMW Z3M Raodster
    Thanks! Is this accessible under the hood or do I need to put the car on a lift to access?

  4. #4
    Join Date
    Oct 2018
    Location
    Surfside, Fl
    Posts
    55
    My Cars
    1998 BMW Z3M Raodster
    Just noticed that my fuel cap was not fully in closed position. Can that cause this issue?

  5. #5
    Join Date
    May 2015
    Location
    Maryland
    Posts
    189
    My Cars
    1998 M Roadster
    Yes

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