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Fuel Mileage Doesn't Reset

Discussion in 'Gen 2 Prius Fuel Economy' started by jstern, Dec 22, 2005.

  1. jstern

    jstern New Member

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    Just got a 05 Prius about a month ago. After first fuel refilling, the fuel mileage reset back to zero (as I believe it is supposed to). Ever since then, it doesn't reset itself after filling up the tank--I have to manually reset. While it sounds like some on this forum would like this to happen, I actually like it restting each time.

    Anyone know why mine doesn't auto reset?

    Jeff
     
    #1 jstern, Dec 22, 2005
  2. maggieddd

    maggieddd Senior Member

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    it doesn't reset right away. Sometimes you can drive almost a mile before it resets itself after refueling.
     
    #2 maggieddd, Dec 22, 2005
  3. ScottY

    ScottY New Member

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    Also if you didn't refuel over certain amount of gallons, it won't reset. I don't have the exact number... I think it's around 3 gal?
     
    #3 ScottY, Dec 22, 2005
  4. maggieddd

    maggieddd Senior Member

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    that's right!
     
    #4 maggieddd, Dec 22, 2005
  5. efusco

    efusco Moderator Emeritus
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    Minimum is reported to be 4 gallons.

    2 other conditions have to be met before the auto-reset occurs.
    1)Fuel guage must reach 'full'.
    2)Then the wheel must turn one full revolution.

    So, if you fill up, pull away, stop at the light to merge into traffic it's likely the guage won't reset.....until you pull away. But then the guage will have registered 'full', then it's just waiting for you to roll again.

    Interestingly, I 'filled' a few tanks ago to what I thought was full (added about 8 gallons), but had pump problems. the guage registered to 9 out of 10 "pips". But I went through the little 'no touch' car wash at the gas station so sat idle for a long time after the guage got to the 9 pip level.

    Then I pulled away and the guage did not ever reset....even after driving about 15 miles. Don't know if it was b/c the guage didn't show completely full or b/c of the long idle time without moving.
     
    #5 efusco, Dec 22, 2005
  6. canuckican

    canuckican New Member

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    Yet another Prius fuel-tank/gas-gauge idiosyncrasy! There are plenty, aren't there? Toyota really did some crazy, fairly non-standard things with their fuel system on this car, I think we would all have to admit, wouldn't we? Once you learn to deal with it, it's no big deal, though.
     
    #6 canuckican, Dec 22, 2005
  7. ScottY

    ScottY New Member

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    Doc, I think condition 1) doesn't have to occur. I remember one time I refuel a decent amount (~5 to 6 gal? not too sure) but not full. The gauge did reset afterward. But I could be wrong, it's all from memory.
     
    #7 ScottY, Dec 22, 2005
  8. aaf709

    aaf709 Ravenpaw of ThunderClan

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    It can take a while. The station where I normally fill up is in a large parking lot. Most of the time it has reset right when I leave. An interesting coincidence, if I didn't activate the BT in my phone, I get a BT connection failure exactly when it resets.
     
    #8 aaf709, Dec 22, 2005
  9. efusco

    efusco Moderator Emeritus
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    And you could be right, I've never personally not filled up all the way. I remember my wife once accidently underfilled (early shut off of pump) and I'm pretty sure the guage automatically reset (I wasn't with her so can't be positive--but I don't think she knows how to do the reset).

    so perhaps #1 should just be changed to "Fill with minimum of 4 gallons"
     
    #9 efusco, Dec 22, 2005
  10. jstern

    jstern New Member

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    Thanks

    I have filled up each time. Drove out of gas station each time. Don't remember about the wheel turn thing. Will have to monitor next time.

    jeff
     
    #10 jstern, Dec 22, 2005
  11. jeromep

    jeromep Member

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    Well, the wheel turn is not the steering wheel, but your vehicle's wheels.

    I will add that I have been fortunate enough to never have a really bad fillup. I've had some that were a bit shallow, however I still got all pips and the display reset as I was pulling out of the gas station.
     
    #11 jeromep, Dec 22, 2005
  12. luvmyhybrid

    luvmyhybrid Junior Member

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    Does anyone know if it's possible to view the total MPG for say the life of the vehicle on the MFD?
     
    #12 luvmyhybrid, Jan 19, 2006
  13. LtRipley36706

    LtRipley36706 New Member

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    I, too, would like to know if its possible to get a lifetime MPG readout.. Is this possible in the 2006 Prius? =)

     
    #13 LtRipley36706, Jan 22, 2006
  14. Frank Hudon

    Frank Hudon Senior Member

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    simple answer=no. long answer=only from your spreadsheet. really long answer only in the Classic Prius was there a lifetime total. It rolls at 9999mile/km but the total mpg/liter per hundred kms. stays as it was.
     
    #14 Frank Hudon, Jan 22, 2006
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