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Low mpg, time for a new battery?

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Jose725, Jun 29, 2017.

  1. Jose725

    Jose725 New Member

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    My prius is a 2013 witg 85k miles. I think the hybrid battery is going out due to the heat.
     
    #1 Jose725, Jun 29, 2017
  2. tankyuong

    tankyuong Senior Member

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    doubt it,just heavy foot
     
    #2 tankyuong, Jun 30, 2017
  3. bisco

    bisco cookie crumbler

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    welcome!

    maybe the tires, 12v, rubbing brakes, stuck emergency brake, clogged air filter, low oil and etc.
    but you can test the hybrid battery with tech stream.
     
    #3 bisco, Jun 30, 2017
  4. Jose725

    Jose725 New Member

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    Went from steady 52 mpg to 36-42. That is a big drop
     
    #4 Jose725, Jun 30, 2017
  5. jerrymildred

    jerrymildred Senior Member

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    Big change in air conditioner use? It takes quite a toll when it gets over 90 degrees or so, especially if you have to park in the sun. It's not impossible, but it seems unlikely that a 2013 would need a new battery this soon.
     
    #5 jerrymildred, Jun 30, 2017
  6. mjoo

    mjoo Senior Member

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    Do you have window tinting? I'd invest in a solar reflector for your dash.
     
    #6 mjoo, Jun 30, 2017
  7. Jose725

    Jose725 New Member

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    Yes sir I live in SE TX so it is 100 on a regular basis.
     
    #7 Jose725, Jun 30, 2017
  8. Jose725

    Jose725 New Member

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    Air filter was indeed changed today. Tires are almost ready to be changed and it is 100 here and I run ac often
     
    #8 Jose725, Jun 30, 2017
  9. bisco

    bisco cookie crumbler

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    make sure you get a good set of low rolling resistance tyres.
     
    #9 bisco, Jun 30, 2017
  10. Jose725

    Jose725 New Member

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    What do you recommend?
     
    #10 Jose725, Jun 30, 2017
  11. bisco

    bisco cookie crumbler

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    i love the michelin energy saver a/s, but they are expensive, and may not fit gen 2. ecopia's are good i think. there are lots of tyre threads here with good advise.
     
    #11 bisco, Jun 30, 2017
  12. Jose725

    Jose725 New Member

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    I noticed I went from 32 mpg in the 100 degree weather to 44 mpg as it cooled down
     
    #12 Jose725, Jun 30, 2017
    jerrymildred likes this.
  13. Jose725

    Jose725 New Member

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    Screenshot_20170702-092431.png
    Hear anything about Kuhmo tires on a prius? Good reviews?

    Posted via the PriusChat mobile app.
     
    #13 Jose725, Jul 2, 2017
  14. Sam Spade

    Sam Spade Senior Member

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    The heat will take a toll.......and make the HV battery a bit less efficient.....but likely won't do any permanent damage.
    You should still be under hybrid warranty so wait until the weather cools off a bit.
    Or take it in if it is due for other service.
     
    #14 Sam Spade, Jul 2, 2017
  15. bisco

    bisco cookie crumbler

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    i've heard of kumho's but don't know anything about them. check tyre rack for reviews. i do like the 68 cent off special!:p
     
    #15 bisco, Jul 2, 2017
  16. Jose725

    Jose725 New Member

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    I went ahead and got hankooks that were recommended to me at the tire shop. Saved about 100 bucks by buying them online and knowing someone who will install for free.

    Posted via the PriusChat mobile app.
     
    #16 Jose725, Jul 2, 2017
  17. bisco

    bisco cookie crumbler

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    great! i hope they are LRR.
     
    #17 bisco, Jul 2, 2017
  18. Jose725

    Jose725 New Member

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    I believe they are. What if they are not?

    Posted via the PriusChat mobile app.
     
    #18 Jose725, Jul 2, 2017
  19. bisco

    bisco cookie crumbler

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    your mpg's will go down some more, depending on what you are replacing.
     
    #19 bisco, Jul 2, 2017
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