Car does not turn off

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Kitty500, Mar 18, 2026 at 8:17 PM.

  1. Kitty500

    Kitty500 Junior Member

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    Location:
    Wisconsin
    Vehicle:
    2005 Prius
    Model:
    II
    The car is not shutting off after the key is removed and the power button is pressed.
    • MFD display turns back on when the car is turned off.(attempted to be turned off)
    • The car beeps as if the key fob is still in the ignition.
    • The cars doors will not lock.
    • All of this creates a drain on the battery.
    • The battery reads less than 12 V with no load and 14.1 with a load
    • a new battery has been placed in the vehicle – AGM
    • disconnected negative cable from a fully charged battery and the next day, the battery has been drained.
    Please help. please provide steps to determine if there is a parasitic draw from the system. I have a multimeter. Thanks in advance….:
     
    #1 Kitty500, Mar 18, 2026 at 8:17 PM
    Last edited: Mar 18, 2026 at 8:25 PM
  2. ChapmanF

    ChapmanF Senior Member

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    How is the combination meter (speed, odo, fuel, mpg, PRNDB) behaving?
     
    #2 ChapmanF, Mar 18, 2026 at 9:26 PM
    Brian1954 likes this.
  3. dolj

    dolj Senior Member

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    Can you confirm that what you mean here is you have disconnected the negative cable from a fully charged battery and left it disconnected for the whole night, then when you checked the voltage of the new battery with a volt meter the next day, it was completely drained–i.e., measured 0 volts. If this is not what you meant, can you state exactly what happened?
     
    #3 dolj, Mar 19, 2026 at 4:40 AM
  4. ChapmanF

    ChapmanF Senior Member

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    It could also have meant "around 10 volts or less", a common threshold for "completely drained" for a 12-volt lead-acid battery.
     
    #4 ChapmanF, Mar 19, 2026 at 5:26 AM
  5. dolj

    dolj Senior Member

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    Understood, but that is not what I was going for. I was intrigued by the battery draining when it was not connected to the car—if that's what happened. Hence the quest for clarification.
     
    #5 dolj, Mar 19, 2026 at 5:49 AM
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