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Whirring noise when coasting

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by sailmaui, Mar 13, 2008.

  1. sailmaui

    sailmaui New Member

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    My 04 Prius started making a whirring noise when it's coasting. Step on accelerator and it goes away. Step on brakes and it goes away. It was doing this before its 60,000 checkup. After the checkup it no longer did it. But with 85,000 miles it is starting to do it again. Any ideas?
     
    #1 sailmaui, Mar 13, 2008
  2. qbee42

    qbee42 My other car is a boat

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    That sounds like electric motor noise. Under power or braking, the motors are loaded, when coasting they spin without load.

    Tom
     
    #2 qbee42, Mar 13, 2008
  3. sailmaui

    sailmaui New Member

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    Thanks. How do I stop the noise? The dealer fixed it during the 60,000 checkup. I don't want to go to dealer unless i really have to.
     
    #3 sailmaui, Mar 13, 2008
  4. Bob64

    Bob64 Sapphire of the Blue Sky

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    does it do it when in neutral?
     
    #4 Bob64, Mar 13, 2008
  5. sailmaui

    sailmaui New Member

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    No. it only happens when i release the accelerator. If you coast down a long hill you really notice it. It will get worse as time goes by. It did the same thing before 60,000 mile checkup and they fixed it.
     
    #5 sailmaui, Mar 14, 2008
  6. richard schumacher

    richard schumacher shortbus driver

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    Try to get the dealer to tell you what it was last time and what they did to fix it. From your description I would have said that that was normal electric inverter noise, but it would be difficult to make that go away... perhaps it was one of the many fluid pumps.
     
    #6 richard schumacher, Mar 14, 2008
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