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2006 Prius Very Loud Engine Noise

Discussion in 'Gen 2 Prius Main Forum' started by Sydney Fletcher, Apr 4, 2020.

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  1. Sydney Fletcher

    Sydney Fletcher New Member

    Joined:
    Apr 4, 2020
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    Location:
    Santa Rosa, CA
    Vehicle:
    2005 Prius
    Model:
    Four
    I went to drive my 2006 Prius and after it being turned on for about 5-10 seconds, it started making a very loud sound from the engine. I immediately turned it off and tried turning it back on a bunch of time but the noise did not go away.

    For some more information:
    • It is at 150,000ish miles and there are no check engine lights coming on.
    • It got an oil change and maintenance check 2 weeks ago.
    • I drove it 4 days ago and everything was fine.
    • It has been fairly warm but it got down to the low 40s last night and it is raining today.
    • I looked under the car and it does not appear to be missing the catalytic converter.
    I have not idea what to do? Should I leave it running and or will my engine be damaged?

    Please Help!
    Sydney
     
    #1 Sydney Fletcher, Apr 4, 2020
  2. SFO

    SFO Senior Member

    Joined:
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    Location:
    Northern California
    Vehicle:
    2007 Prius
    Model:
    N/A
    Welcome to PriusChat!!
    Does it sounds like a tank, or can you describe the "very loud noise" you hear coming from the engine area?
     
    #2 SFO, Apr 5, 2020
  3. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    previously, did you start it, and then shut it down before it finished warming up?
     
    #3 bisco, Apr 5, 2020
  4. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
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    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Double check the cat is not missing? Second gens are VERY popular targets.
     
    #4 Mendel Leisk, Apr 5, 2020
    bisco likes this.
  5. JoeB

    JoeB Junior Member

    Joined:
    Apr 9, 2021
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    Location:
    Rockaway NJ
    Vehicle:
    2009 Prius
    Model:
    Base
    When I was a kid, my mom started the Jeep and Rat tat tat tat so she quickly shut it off. Secons later a kitten ran out from under the car with a bit of a head wound. The jeep was fine but the cat never was quite right after that.
     
    #5 JoeB, Jul 29, 2021
  6. JoeB

    JoeB Junior Member

    Joined:
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    Location:
    Rockaway NJ
    Vehicle:
    2009 Prius
    Model:
    Base
    This was before cars even had cats.
     
    #6 JoeB, Jul 29, 2021
  7. ChapmanF

    ChapmanF Senior Member

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    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    That happened to me once (in a former vehicle with multiple fan/alternator/steering/AC belts), and I had to scoop up what was left of the cat and have it put down. The day that happened was not one of my favorites.
     
    #7 ChapmanF, Jul 29, 2021
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