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2012 fuel gauge prob.

Discussion in 'Gen 1 Prius Plug-in 2012-2015' started by Peter Cockroft, May 3, 2021.

  1. Peter Cockroft

    Peter Cockroft New Member

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    Can someone help..... sitting at the lights the other day the fuel gauge had lost 3 of its 10 light bars suggesting the tank was a third down. The fuel figure at the left end of the heads-up display said I had about 640 kms to go before I needed to fill up.....as I watched, the fuel gauge counted down the light bars and left the bottom one flashing ....and the fuel figure said I had 12 kms left before I had to fill up and it flashed too !
    It took just 16.5 litres to top up so still had heaps.........any ideas greatly rec'd
     
    #1 Peter Cockroft, May 3, 2021
  2. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    Maybe the float gizmo in the tank sprung a leak?
     
    #2 Mendel Leisk, May 3, 2021
  3. bisco

    bisco cookie crumbler

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    does not sound like a simple diagnosis unfortunately. how is the 12v health?
     
    #3 bisco, May 3, 2021
  4. Peter Cockroft

    Peter Cockroft New Member

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    After I filled up the fuel lights showed full, and the heads-up display said I had 940km to travel before needing to re-fuel again......
     
    #4 Peter Cockroft, May 3, 2021
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  5. Peter Cockroft

    Peter Cockroft New Member

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    Hey Bisco, how can I check the health of the 12v ?
    ....thanks
     
    #5 Peter Cockroft, May 3, 2021
  6. bisco

    bisco cookie crumbler

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    put a volt meter on it, then run the headlights for 5 minutes for a before and after load voltage comparison.
    here, auto parts stores will perform a free test with an electronic load tester. might be worth calling round
     
    #6 bisco, May 4, 2021
    Last edited: May 4, 2021
  7. Peter Cockroft

    Peter Cockroft New Member

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    much appreciated, thanks Bisco
     
    #7 Peter Cockroft, May 4, 2021
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