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.
     
  2. 05PreeUs

    05PreeUs Senior Member

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    Driving style?
     
  3. PriusNYC96

    PriusNYC96 Junior Member

    Joined:
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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.
     
  4. audiodave

    audiodave Active Member

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    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.
     
  5. bisco

    bisco cookie crumbler

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    Location:
    boston
    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
     
    James1964 and audiodave like this.
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