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Knocking noise once the Prius is turned off

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Cacti, Jul 27, 2012.

  1. Cacti

    Cacti Poleikleng

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    Plug-in Base
    What would cause a knocking noise once the Prius (2007) is turned off? I have never noticed this kind of noise in the past.

    Cacti
     
    #1 Cacti, Jul 27, 2012
  2. jdenenberg

    jdenenberg EE Professor

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    The coolant thermos pump runs after the car is shut off. It should make a whirring sound not knocking.

    JeffD
     
    #2 jdenenberg, Jul 27, 2012
  3. Cacti

    Cacti Poleikleng

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    Jeff,

    Thanks for the response. Diffently a knocking sound and it also appears to be from the rear of the vehicle?

    Cacti
     
    #3 Cacti, Jul 27, 2012
  4. jdenenberg

    jdenenberg EE Professor

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    The only thing that moves in the rear is the HV battery cooling fan. Open the vent and check for something that is hitting the fan blades.

    Jeff
     
    #4 jdenenberg, Jul 27, 2012
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