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AVG MPH Question

Discussion in 'Gen 3 Prius Fuel Economy' started by JC91006, Mar 21, 2014.

  1. JC91006

    JC91006 Senior Member

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    Hello people,

    I have a question on my 2010, my Avg MPG reading is around 47mpg, however my aveg mph reading is only 18. It seems to float around this number, not going up or down much. This car is driven on streets often but how can I avg only 18mph for so long? Even if I drive 30 miles on the highway, it would still have a similar reading. Any clues?
     
    #1 JC91006, Mar 21, 2014
  2. jdcollins5

    jdcollins5 Senior Member

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    Where are you reading aveg mph?

    If it is one of the Trip data try resetting.
     
    #2 jdcollins5, Mar 21, 2014
  3. bisco

    bisco cookie crumbler

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    i am always surprised how low avg mph seems, but 18 is really low. i think it's time divided by miles, so includes time stopped at lites and etc.
     
    #3 bisco, Mar 21, 2014
  4. JC91006

    JC91006 Senior Member

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    mph.jpg mph.jpg
     
    #4 JC91006, Mar 21, 2014
  5. JC91006

    JC91006 Senior Member

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    You have to ignore the fuzzy screen, I have one of those early 2010's that never got fixed under warranty. Thanks Bisco, I guess I spend a lot of time stopped at a light
     
    #5 JC91006, Mar 21, 2014
  6. Whiteyprius

    Whiteyprius Active Member

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    Not to worry - It's just the math. any time you stop your're dragging the mph way down.
     
    #6 Whiteyprius, Mar 21, 2014
  7. jdk2

    jdk2 Active Member

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    I'd have a headache if I had to look at that screen all the time (n)
     
    #7 jdk2, Mar 21, 2014
  8. JC91006

    JC91006 Senior Member

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    I don't drive this car much, but even if I do, I rarely look at that screen. The odometer is clear and not distorted.

    One day I'll take it apart and clean it.

    SM-N900P ?
     
    #8 JC91006, Mar 21, 2014
    jdk2 likes this.
  9. Stratman

    Stratman Member

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    I've noticed mine doesn't change by very much, up or down. Does it calculated trip to trip, when trip meters are zeroed, whenever the tank is refilled?
     
    #9 Stratman, Apr 12, 2014
  10. jdk2

    jdk2 Active Member

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    It zeros when you reset that particular trip. It's just an average for the trip. Trip A and Trip B can be set independently.
     
    #10 jdk2, Apr 12, 2014
  11. Stratman

    Stratman Member

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    I figured that out when it comes to the avg mpg but does it do that also with the avg mph readout to the far bottom left?
     
    #11 Stratman, Apr 12, 2014
  12. jdk2

    jdk2 Active Member

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    I don't have any mph display on the bottom left, only on the lower right of the trip display.
     
    #12 jdk2, Apr 12, 2014
  13. Stratman

    Stratman Member

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    Sorry. Meant lower right.
     
    #13 Stratman, Apr 12, 2014
  14. RRxing

    RRxing Senior Member

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    The Average MPH resets with a Trip A or Trip B reset. Low MPH (like mine) is just letting you know how crappy a commute you have. :D It is calculating miles/time, including when the car is not moving.
     
    #14 RRxing, Apr 13, 2014
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