Prius second generation low MPG problem

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by PriusNYC96, Nov 20, 2018.

  1. PriusNYC96

    PriusNYC96 Junior Member

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    2009 Prius
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    I have a Prius second generation and I am having MPG problems. Replacing the spark plugs didn’t change anything. Could anyone guess what it could be? The dashboard doesn’t show any error messages.
     
    #1 PriusNYC96, Nov 20, 2018
  2. 05PreeUs

    05PreeUs Senior Member

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    2005 Prius
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    Driving style?
     
    #2 05PreeUs, Nov 22, 2018
  3. PriusNYC96

    PriusNYC96 Junior Member

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    2009 Prius
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    My driving style hasn’t changed. I am used to averaging 50 miles per gallon and getting around 500 miles from a tank of gas so when that changed and I started getting about 200-300 miles from a tank of gas I changed the spark plugs and engine air filter but that didn’t solve the problem. Maybe I need new fuel injectors or a new catalytic converter.
     
    #3 PriusNYC96, Nov 22, 2018
  4. audiodave

    audiodave Active Member

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    Five
    So many possibilities. How's the tires? Even wear? Alignment helped on mine but required replacing parts before it could be done.

    Posted via the PriusChat mobile app.
     
    #4 audiodave, Nov 22, 2018
  5. bisco

    bisco cookie crumbler

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    Location:
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    Vehicle:
    2012 Prius Plug-in
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    Plug-in Base
    tire pressure

    12 volt

    weak hybrid battery

    throttle body

    injectors

    air filter

    cabin filter

    hand brake or regular brake drag
     
    #5 bisco, Nov 22, 2018
    James1964 and audiodave like this.
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