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fuel gauge problems

Discussion in 'Gen 2 Prius Main Forum' started by sanlen, Aug 30, 2015.

  1. sanlen

    sanlen Junior Member

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    II


    I am having problems with the fuel gauge on my Prius 2007. While i was driving with 3 bars of fuel remaining, the trip was reset to zero by itself and the fuel bar became 10 bars (full).

    I refill the fuel by make it full tank and drive more than 200 miles (in city) but the fuel bars go down only two bars (normally it consumes more than 5 bars).

    Could you please advise what is the problems and how to get it fixed?

    You advise will be very much appreciated.

    sanlen
     
  2. valde3

    valde3 Senior Member

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    If your Prius is not North American version you can take out the fuel sending unit and test the fuel level sender that’s in the tank. And you can even test it without taking it out.
     
  3. 05 200k prius

    05 200k prius New Member

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  4. CooCooCaChoo

    CooCooCaChoo Active Member

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    You could also try to recalibrate the gauge so that it is a bit more accurate.
     
  5. dolj

    dolj Senior Member

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    @sanlen, did this happen while you were driving, or did you shut down the car with 3 bars, and then the next start it had 10 bars?

    If the latter, have you checked the health of the 12 V battery? If it is < ~12.1 V and drops to below 10.5V on start up, you will need to charge it up fully. If the battery will not achieve ~12.9-13.2 V and then maintain > 12.7 V after sitting overnight, you will need to replace the 12 V battery.

    Do all the voltage checks at the battery with the car off and not having run for at least 2 hours.