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2010 Engine continuously running.

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by thechadster, Feb 9, 2018.

  1. thechadster

    thechadster Junior Member

    Joined:
    Aug 22, 2012
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    Vehicle:
    2004 Prius
    Model:
    Two
    2010 Prius. When I start the car cold the cars acts like it should. Fires up until warm and then shuts off. Once it has been driven for a while the engine stays on all the time. If I shut the car off and restart it doesn't do the normal engine fire-up and shutoff. As soon as I hit the accelerator the engine starts and stays on until shut off. At stoplights the engine will be on with no charging being shown on the charging monitor. It also gets herky jerky, doesn't have the same power as before the engine stays on continuously. I have unplugged 12v battery for 1 hour as well. Still same thing happens. As you can imagine, gas mileage is in the crapper.
     
    #1 thechadster, Feb 9, 2018
  2. Dxta

    Dxta Senior Member

    Joined:
    Nov 7, 2016
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    Location:
    Lagos
    Vehicle:
    2008 Prius
    Model:
    II
    Your hybrid battery pack might be the culprit.

    Have you got any Christmas lights on the dash?

    My guess is your HV battery is on its way heading South:D
     
    #2 Dxta, Feb 9, 2018
    Mendel Leisk likes this.
  3. Raytheeagle

    Raytheeagle Senior Member

    Joined:
    Jul 1, 2016
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    Location:
    Bay Area, California
    Vehicle:
    2019 Prius Prime
    Model:
    Prime Plus
    Before we jump to too many conclusions, some additional questions;):

    • How many miles on your Prius?
    • What maintenance has been done?
    • Where are you located?
    • Do you leave the climate control in auto?
    • Have you ever cleaned the egr circuit?
    • Does the HSI screen performance of the battery cycle between full and low quickly?
    • What was your mpg before and what is it now?
    • How long and how many miles have you noticed this phenomenon?
    Keep us posted (y).
     
    #3 Raytheeagle, Feb 9, 2018
    NutzAboutBolts, Mendel Leisk, bisco and 1 other person like this.
  4. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    how is the 12v health?
     
    #4 bisco, Feb 9, 2018
    Prodigyplace and Raytheeagle like this.
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