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MPG lower than last Gen 2 Prius

Discussion in 'Gen 2 Prius Technical Discussion' started by Shawn W., Feb 26, 2023.

  1. Shawn W.

    Shawn W. Junior Member

    Joined:
    Jun 8, 2022
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    Location:
    Niagara Falls
    Vehicle:
    2004 Prius
    Model:
    N/A
    This isn't a problem per se, but I've been noticing that my current Gen 2 Prius (2004) is averaging several MPG lower than my last Gen 2 Prius (2005) under the same driving conditions as the last one. The hybrid battery shows on the touchscreen that it's getting a full charge, but I'm still wondering if it's due to the age of the battery, and if there's a way that I can test it, and what to do if that's the case. Any thoughts or suggestions?
     
    #1 Shawn W., Feb 26, 2023
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,960
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    all cars may be created equal, but like people, they don't all age well.

    so many things can affect mileage, but if you want to start with the battery, get the dr. prius app.

    you can do a health check, and module voltages
     
    #2 bisco, Feb 26, 2023
  3. Mpdcnva

    Mpdcnva Member

    Joined:
    Aug 16, 2020
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    Location:
    Washington dc
    Vehicle:
    2010 Prius
    Model:
    Four Touring
    I can say. My 04 299000, and 05 350000, ran rough with misfire codes. Reman injectors fixed the rough idle, but the improvement of mpg went from 41 to 50 instantly.
     
    #3 Mpdcnva, Apr 6, 2023
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