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Fuel tank reset problems

Discussion in 'Gen 2 Prius Fuel Economy' started by Tony714, May 2, 2022.

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  1. Tony714

    Tony714 Member

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    Hey Prius peeps, having a bit of an issue with my fuel tank. I have a 2008 and it usually gets around 46-48 so I’m happy with that.

    Problem I have is the tank. I know the fuel tank/level reset procedure and it does not seem to work very well or for very long. Best I get in there is 8.5 gallons.

    is there a best time to do the reset? Full tank, empty tank? Or do I have to do it multiple times each reset?
     
    #1 Tony714, May 2, 2022
  2. TMR-JWAP

    TMR-JWAP Senior Member

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    How much do you want to get in? 8.5 gallons is not abnormal for a typical Gen 2 to go from flashing dot to full.
    Do you want the flashing dot to represent 1 drop of gas in the tank?
     
    #2 TMR-JWAP, May 2, 2022
  3. Another

    Another Senior Member

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    8.5 gallons is about 400 miles of range at your quoted mpg, which seems pretty good range. Do you often drive longer distances than that?
     
    #3 Another, May 3, 2022
  4. Tony714

    Tony714 Member

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    When I do the reset, it goes up to about 8ish. Then it can go as low as about 6.5. If I’m lucky it’ll stay at about 8 for a month or so, then will slowly go down
     
    #4 Tony714, May 3, 2022
  5. Another

    Another Senior Member

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    Count your blessings
    It could be worse
     
    #5 Another, May 3, 2022
  6. mmmodem

    mmmodem Senior Taste Tester

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    ~8.5 is all I get as well. Isn't that normal? The tank size is 11.9 gal, adding two gallons for reserve, that's 9.9 you can theoretically get when the fuel light comes on.

    I assume because of the bladder, I usually get 8 in the winter and closer to 10 in the summer. I've reset the fuel tank a few times and I'm fine with the results. Good luck, OP
     
    #6 mmmodem, May 3, 2022
  7. Tony714

    Tony714 Member

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    Reason I ask is in my previous ‘05 I only had to reset a few times and it stayed consistent. My ‘08 is just a little more random about the tank.
     
    #7 Tony714, May 3, 2022
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