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Trouble codes 0441 and 0445

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Mike Jossa, Sep 16, 2019.

  1. Mike Jossa

    Mike Jossa New Member

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    Location:
    Lago Vista, tx
    Vehicle:
    2007 Prius
    Model:
    IV
    Can’t seem to find the cause of these codes. Had the fuel tank (which I had replaced) and evap system smoke tested. No leaks. Replaced both control valves/ solenoids in purge system. Replaced vacuum pressure canister and pressure sensor. Vacuum tested line to carburetor. It held.
    What have I missed?

    P.S. Just completed a road trip of 4300 miles with no problems and got approximately 42 mpg.
    Should I be concerned?
     
    #1 Mike Jossa, Sep 16, 2019
  2. bisco

    bisco cookie crumbler

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    Plug-in Base
    are those prius codes? what reader are you using?
     
    #2 bisco, Sep 16, 2019
  3. Mike Jossa

    Mike Jossa New Member

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    IV
    No. They are standard OBDII codes. 0441 is “incorrect purge system flow”.
    The other indicates a large leak in the outrage system.
     
    #3 Mike Jossa, Sep 18, 2019
  4. Mike Jossa

    Mike Jossa New Member

    Joined:
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    IV
    that’s purge system.
     
    #4 Mike Jossa, Sep 18, 2019
  5. dolj

    dolj Senior Member

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    They are actually P0441 and P0445, which is why bisco is asking, because without the letter (which indicates the system), they look odd.

    Diagnosis of these two codes is pretty involved, and I suggest taking a 2 day subscription at Technical Information System (TIS) and reading up on them.
     
    #5 dolj, Sep 18, 2019
    Skibob likes this.
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