Gas mileage decreased 08 Prius ???

Discussion in 'Gen 2 Prius Fuel Economy' started by Seanmm1984, Jul 30, 2019.

  1. Seanmm1984

    Seanmm1984 New Member

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    Vehicle:
    2008 Prius
    Model:
    II
    Hey everybody I have a 2008 Prius touring model. I normally get between 41-46 mpg but has recently dropped to 34-37 and have been trying to figure out why. I recently had the hybrid battery replaced because I thought that might be the issue and it threw c1310 as a code but no light in the dash currently. Any ideas? Could use any insight and would really appreciate it.
     
  2. bisco

    bisco cookie crumbler

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    welcome!

    is it a new toyota oem battery?
     
  3. Seanmm1984

    Seanmm1984 New Member

    Joined:
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    Location:
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    Vehicle:
    2008 Prius
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    II
    Reconditioned but with a 12 month warranty, after replacement noticed no increase in mpg but had no warning lights otherwise just thought I had the be the issue since everything else on the car is really we’ll maintained
     
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  4. SFO

    SFO Senior Member

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    Welcome to PriusChat!!

    Here is the workup for DTC C1310 : https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/Repair%20Manual/04pruisr/05/21avn/cic12595.pdf

    Do you know which OBD2 scanner that was used to retrieve the above DTC?

    Do you know if the mechanic also cleaned the HV battery fan?

    If you haven't already, please read this thread for additional help : Fuel economy complaints/queries? Please copy, paste & answer these questions, esp. if you're new | PriusChat
     
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  5. srellim234

    srellim234 Senior Member

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    Location:
    Laughlin, Nevada
    Vehicle:
    2008 Prius
    Model:
    Touring
    I see you're just south of me. Assuming you've been doing the obvious maintenance items and checking your tire air pressure, how long have you had the car? If you're comparing to our winter driving and you haven't had the car for very long, note that the 100* weather is going to drop your gas mileage in the summer. Mine routinely goes from around 43 mpg to the high 30s in the summertime.

    We can help you a lot more if we can get some answers to most of the questions here

    Fuel economy complaints/queries? Please copy, paste & answer these questions, esp. if you're new | PriusChat

    Otherwise, we're just taking wild guesses without proper hard facts to look at.
     
  6. srellim234

    srellim234 Senior Member

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    Touring
    Too quick for me, SFO. You posted the link while I was copying and pasting.:)(y)
     
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