1. Attachments are working again! Check out this thread for more details and to report any other bugs.

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

    Joined:
    May 3, 2021
    4
    2
    0
    Location:
    New Zealand
    Vehicle:
    2012 Prius Plug-in
    Model:
    N/A
    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 Senior Member

    Joined:
    Oct 17, 2010
    54,691
    38,232
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Maybe the float gizmo in the tank sprung a leak?
     
    #2 Mendel Leisk, May 3, 2021
  3. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,747
    48,962
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    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

    Joined:
    May 3, 2021
    4
    2
    0
    Location:
    New Zealand
    Vehicle:
    2012 Prius Plug-in
    Model:
    N/A
    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
    bisco likes this.
  5. Peter Cockroft

    Peter Cockroft New Member

    Joined:
    May 3, 2021
    4
    2
    0
    Location:
    New Zealand
    Vehicle:
    2012 Prius Plug-in
    Model:
    N/A
    Hey Bisco, how can I check the health of the 12v ?
    ....thanks
     
    #5 Peter Cockroft, May 3, 2021
  6. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,747
    48,962
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    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

    Joined:
    May 3, 2021
    4
    2
    0
    Location:
    New Zealand
    Vehicle:
    2012 Prius Plug-in
    Model:
    N/A
    much appreciated, thanks Bisco
     
    #7 Peter Cockroft, May 4, 2021
    bisco likes this.
(You must log in or sign up to post here.)