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Changing spark plugs

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Grichard, May 25, 2011.

  1. Grichard

    Grichard Junior Member

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    I got the plugs for my '06. I hope to put them in in a day or 2. My question is: is it necessary to disconnect the 12v battery to do this? I've changed plugs in other cars without doing so. Thanks...Dick
     
    #1 Grichard, May 25, 2011
  2. seilerts

    seilerts Battery Curmudgeon

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    Not necessary
     
    #2 seilerts, May 25, 2011
  3. stefano5777

    stefano5777 Member

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    You will not need to disconnect battery same as a regular car. You will just need a thin wall socket and extension.
     
    #3 stefano5777, May 25, 2011
  4. Hope McCloud

    Hope McCloud New Member

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    I have a 2005 Prius and changed the plugs without disconnecting the battery. Got PROBLEM engine light and Hybrid Warning Light!!! Solution - disconnect and re-connect the battery - causing the computer to reset and the lights to go off. PS It also reset the back-up beep back to ON.
     
    #4 Hope McCloud, Aug 15, 2011
  5. kohnen

    kohnen Grumpy, Cranky Senior Member

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    Changed them on my '07 no problem.

    Don't need to disconnect battery, but you should have your car turned off (not ACC, not READY).

    No warning lights, worked just fine.
     
    #5 kohnen, Aug 15, 2011
  6. seilerts

    seilerts Battery Curmudgeon

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    The service manual says to disconnect, but it is not necessary. It is possible that the husband disconnected something else that was in the way and caused the problem. However, a happy ending nonetheless.
     
    #6 seilerts, Aug 15, 2011
  7. uart

    uart Senior Member

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    Most workshop manuals list disconnecting the battery negative as the first step in many procedures purely as a safety measure to prevent any possibility of the car being started while the work is being performed.

    Just switch the sks system off and have your keys in a safe place (other than the ignition).
     
    #7 uart, Aug 15, 2011
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