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MPG dropping on my 2013 Prius V

Discussion in 'Prius v Main Forum' started by Cinco, Jun 10, 2021.

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  1. Cinco

    Cinco New Member

    Joined:
    Oct 9, 2020
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    Location:
    Tennessee
    Vehicle:
    2013 Prius
    Model:
    V
    Greetings. I have a 2013 Prius V-5 with 66,800 miles on it. We've noticed some lower mileage so I set the Trip A to 0.0 and filled up the tank. The V got 233 miles to 8 Gallons (29.125 mpg) in normal city driving. This is one test but my thought is that the gas engine is kicking in more because the battery is not kicking in when it should due to weakness. The battery gauge never shows zero but sometimes drops to 1/4 awfully fast. I can get it to 100% by coasting and breaking on hills.

    Does the group have an opinion based on previous experience with this?
     
    #1 Cinco, Jun 10, 2021
  2. Air_Boss

    Air_Boss Senior Member

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    Vehicle:
    2012 Prius v wagon
    Model:
    Five
    Has the inverter motor generator firmware revision TSB been accomplished?
     
    #2 Air_Boss, Jun 10, 2021
  3. Tim Jones

    Tim Jones Senior Member

    Joined:
    Jul 17, 2018
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    Location:
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    Vehicle:
    2011 Nissan LEAF
    Model:
    ----USA----
    Check the antifreeze. Is it full and staying in the same place.
    Usually when the inverter goes the car can hardly move and lots of lights are on.
    Traction battery could be bad but will usually throw a Check Engine Light when the battery is that weak.
    I don't think the green bars can go down to nothing.... I've had the inverter repaired and the traction battery replaced and I didn't have these symptoms. but It got down down to 36 mpg when I replaced it.
    Check tire pressure.
     
    #3 Tim Jones, Jun 10, 2021
  4. bisco

    bisco cookie crumbler

    Joined:
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    what do you normally average? a weak battery would be unusual, but not unheard of. what you're seeing on the battery indicator seems normal.

    jack it up and make sure the wheels all spin freely
     
    #4 bisco, Jun 10, 2021
  5. Tim Jones

    Tim Jones Senior Member

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    Location:
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    Vehicle:
    2011 Nissan LEAF
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    ----USA----
    I forgot it can go down to two purple.
    I rarely see that unless I've been on electric creaping around.
     
    #5 Tim Jones, Jun 11, 2021
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