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Opened gas cap while car was on..

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Priusdemon, Sep 20, 2024.

  1. Priusdemon

    Priusdemon New Member

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    2010 Prius
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    Went to the gas station and opened the gas cap while car was on and pressure released from the gas cap.. ever since the. The engine won’t go to idol when using the electric motor, and when I come to a stop the engine switches on and off, messing up the mileage I could be saving from using electric… I switch the mass air sensor and the check engine light went off but the car ain’t running the same. Is it a quick fix, and does it have anything to do with the pressure in the engine itself?
     
    #1 Priusdemon, Sep 20, 2024
  2. Tombukt2

    Tombukt2 Senior Member

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    Car on in this description means engine running?
     
    #2 Tombukt2, Sep 21, 2024
  3. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    #3 Mendel Leisk, Sep 21, 2024
    Last edited: Sep 21, 2024
  4. BiomedO1

    BiomedO1 Senior Member

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    I'm surprised you didn't get an Evap error code.

    the car needs to be scanned to see what's causing your issues.
     
    #4 BiomedO1, Sep 21, 2024
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