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Engine won't turn over

Discussion in 'Gen 2 Prius Main Forum' started by Will C, Feb 12, 2024.

  1. Will C

    Will C New Member

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    2009 Prius
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    Hey folks, we have a 2006 and 2009 toyota prius that are experiencing ignition issues. We've replaced the 12 v aux batteries in both and have intermittent engine turn over. Some days they start just fine and other days they need a jump to get going. I need to put a volt meter on them but there seems to be some voodoo we cant figure out as they do start right up certain days. We have also made sure the ground cable is tightened up on both. I'm wondering if there is a contact issue somewhere. We also know that some mice have made there home in them over the years and I fear they may have chewed up some cables in the process. Let me know if y'all have any ideas before I take it back to a qualified tech. Thank you !
     
    #1 Will C, Feb 12, 2024
  2. bisco

    bisco cookie crumbler

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    i can't think of anything that would affect two cars in the same way out of the blue.

    who installed the 12 volts?

    when they start, go to autozone for a free load test.
     
    #2 bisco, Feb 12, 2024
  3. Brian1954

    Brian1954 Active Member

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    Take voltage measurement at the battery in the back and also at the jump point in the front. How close are the voltages to each other? Tell us what voltages you have.
     
    #3 Brian1954, Feb 12, 2024
  4. mr_guy_mann

    mr_guy_mann Senior Member

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    Need some voltmeter readings from the 12V systems when things don't work.

    Could be looking at a 12V problem.

    Could be looking at a Combination Meter (bad capacitor).



    Posted via the PriusChat mobile app.
     
    #4 mr_guy_mann, Feb 13, 2024
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