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Problem with Scan Gauge MPG'S

Discussion in 'Gen 2 Prius Main Forum' started by sandman, Aug 15, 2008.

  1. sandman

    sandman Member

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    OK got my scan gauge II been using it for a week now, but after getting gas and changing the amount of gas I actually pumped versus what the SG2 said my MPG"s have been way off. Is there a way to adjust them ? The instant MPG's are correct but the Current Fuel Economy and the tank MPG's are way off. I am 400 miles into this tank my MFD shows 61.2MPG and the SG2 tank MPG says 50 MPG . I was at 60.6mpg when I left work and it went up but when I got home my CFE showed 44.6mpg and it all started after the second fill-up ..any help would be greatly appreciated..thanks
     
    #1 sandman, Aug 15, 2008
  2. mnky357us

    mnky357us bweverka

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    This in no way answers your question, but one I have about the Scan Gauge also.

    My brother and I both have 2008 prius and both have scan gauges, well mine is
    off on the MPH about 1 mile per hour, my brothers is off about 5 to 7 miles per hour.
    Does this mean that if it is off that far how far off would the rest of its readings be?

    Thanks for any info....
     
    #2 mnky357us, Aug 22, 2008
  3. sandman

    sandman Member

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    I Thought I had my problem solved I went back to factory presets and gauge was good then I re-calibrated it (filled up at same station twice didn't make any changes until second time) but my current fuel economy is off again ..:( it was correct until second time filling up I changed the amount of gas I put in . I am going to wait until next fill up and see if it fixes it. The only thing I can think is the first time I got gas was in the cool morning this time it was 93 degrees maybe that is what did it..
     
    #3 sandman, Aug 22, 2008
  4. ivanbg

    ivanbg Junior Member

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    When you dived the gallons filled up with the miles traveled which gauge is more accurate?
     
    #4 ivanbg, Aug 28, 2008
  5. richard schumacher

    richard schumacher shortbus driver

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    A man with one watch always knows what time it is. A man with two is never certain.
     
    #5 richard schumacher, Aug 28, 2008
  6. ceric

    ceric New Member

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    A man with two atomic watches always know that his watches are within 1 second to each other. ;)

    I have ScanGaugeII on my Mazda CX-9. It lacks a trip computer so I use ScanGauge instead. After calibration, it has been very accurate. So, maybe the inaccuracy is related to hybrid system? Just a thought.
     
    #6 ceric, Aug 28, 2008
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