Discrepancy in Gen 2 between comsumption INdex and Fill-up match

Discussion in 'Gen 2 Prius Main Forum' started by Robert Drzewiczewski, Apr 25, 2025 at 3:31 PM.

  1. Robert Drzewiczewski

    Robert Drzewiczewski Junior Member

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    2006 Prius
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    II
    Today, I filled up and did the math, it showed 18.5, which is in the range of the 15-23 mpg I have been getting, but the consumption index said 32.5. I am working on a new battery but would like to know if anyone else has encountered this oddity. My dashboard lights only come on sometimes. Any input, insight would help-thanks robertd
     
    #1 Robert Drzewiczewski, Apr 25, 2025 at 3:31 PM
  2. pasadena_commut

    pasadena_commut Senior Member

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    15-23 mpg is very low for this vehicle. The only way mine (working normally, AFAIK) would ever be that low would be if it was only ever driven up hill.

    The MPG estimation shown by the Prius is usually a little optimistic. Up to 5-10% higher than the actual fuel consumption. Remember to reset it at each fill up or the number it shows would not be commensurable with the number calculated from (delta miles)/(gas in this fill up).
     
    #2 pasadena_commut, Apr 25, 2025 at 4:15 PM
  3. bisco

    bisco cookie crumbler

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    might need combo meter repair:watch
     
    #3 bisco, Apr 25, 2025 at 8:55 PM
  4. MAX2

    MAX2 Senior Member

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    What indicators are you talking about? Your dashboard displaying the car's speed doesn't work?
     
    #4 MAX2, Apr 28, 2025 at 2:32 AM
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