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36 mpg for the past 3 months - what should dealer check?

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by smassey22180, Dec 22, 2014.

  1. smassey22180

    smassey22180 Junior Member

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    2010 package V (Uppercase V, not five, since its a 2010 and Roman numerals were used during model year 2010 to denote model) ith 40k miles. Still under Toyota extended warranty. We got 43 mpg this time last year. I think it got worse after the IPM recall which involved a complete inverter replacement for us. We drive mostly in the suburbs. We have 17" wheels so that is -2mpg for those. Air filter is new. Any ideas?

    thanks
     
    #1 smassey22180, Dec 22, 2014
  2. JC91006

    JC91006 Senior Member

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    Did your inverter fail when you brought it in? I noticed this year my gas mileage has decreased a little too. Maybe the cheaper gas this year gives less mpg?
     
    #2 JC91006, Dec 22, 2014
  3. smassey22180

    smassey22180 Junior Member

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    We had the recall software update done in March and then the inverter failed in July. It took 2+ months to get the part in and we did not get the car back until Sept.

    thanks
     
    #3 smassey22180, Dec 22, 2014
  4. fuzzy1

    fuzzy1 Senior Member

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    #4 fuzzy1, Dec 22, 2014
  5. Easy Rider 2

    Easy Rider 2 Senior Member

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    If the 12 V battery has never been changed, you are about due.
    I would start there, whether it tests "good" or not.
     
    #5 Easy Rider 2, Dec 23, 2014
  6. smassey22180

    smassey22180 Junior Member

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    That is probably a good idea anyway. We are on our 3rd one for the 06 Lexus RX400h and they go without warning.
     
    #6 smassey22180, Dec 23, 2014
  7. bisco

    bisco cookie crumbler

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    some have lost 8 mpg after the inverter update.
     
    #7 bisco, Dec 23, 2014
    Mendel Leisk likes this.
  8. lester williams

    lester williams Member

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    My mpg has been going down lately also. However, I think it is the $1.92 per gallon gas I am putting in it now---- and running lots faster in the interstate.........
     
    #8 lester williams, Dec 23, 2014
  9. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    We had the inverter protection update with no ill effect. But there's been a lot of reports here of marked mpg loss post-update. Maybe the software used for the update is buggy?
     
    #9 Mendel Leisk, Dec 23, 2014
  10. Blizzard_Persona

    Blizzard_Persona Senior Member

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    This would have made me lose my mind do believe...
     
    #10 Blizzard_Persona, Dec 25, 2014
  11. bisco

    bisco cookie crumbler

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    i think it must be, because cars that weren't part of the recall, (i assume they had updated inverters) aren't showing decreased mpg's. i wonder what would happen if they compared two cars on the epa dyno test?
     
    #11 bisco, Dec 25, 2014
  12. Former Member 68813

    Former Member 68813 Senior Member

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    brake pads and slide pins may need attention. but dealer will wait till they are all screwed up before doing anything.
     
    #12 Former Member 68813, Dec 26, 2014
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