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Intermittent knocking sound from engine, 2012 Prius v

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by lsp61, Oct 1, 2017.

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  1. lsp61

    lsp61 Junior Member

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    On this last occasion, it was parked overnight in the driveway. On the previous occasions the noise occurred while driving at slow speed -- approaching a traffic light, in a car park. I cannot recall driving it a short distance and shutting it down, will keep it in mind in the future.
     
    #21 lsp61, Oct 4, 2017
  2. bisco

    bisco cookie crumbler

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    was the car fully warmed up when it happened while driving at low speed?
     
    #22 bisco, Oct 4, 2017
  3. lsp61

    lsp61 Junior Member

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    Yes, it was on previous occasions. Not, on this last occasion.
     
    #23 lsp61, Oct 4, 2017
  4. bisco

    bisco cookie crumbler

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    afaik, the rattling sound, and diagnosis by air boss is related to cold soak, cold engine start. you may want to have them check/clean your egr and intake manifold. how is your oil level?
     
    #24 bisco, Oct 4, 2017
  5. lsp61

    lsp61 Junior Member

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    Oil level is well within normal limits. I have seen the EGR problem mentioned on the forum, so that may be worth checking out. This last occasion was definitely a cold start, however the ambient temperature was not cold. I can never reproduce the problem at the Toyota service center, which is frustrating.
     
    #25 lsp61, Oct 4, 2017
    bisco likes this.
  6. bisco

    bisco cookie crumbler

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    also, ask them if there is a tab on the intake manifold, and show them your video.
     
    #26 bisco, Oct 4, 2017
  7. lsp61

    lsp61 Junior Member

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    Thanks for your advice! Will certainly show them the video.
     
    #27 lsp61, Oct 4, 2017
  8. Air_Boss

    Air_Boss Senior Member

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    As this is usually an intermittent condition, thus tough to duplicate or track down, any dealer check or clean usually cleans out your wallet more than it clears up the condition. That said, just bring in your video/audio clip and play it for the service manager.
     
    #28 Air_Boss, Oct 5, 2017
  9. Air_Boss

    Air_Boss Senior Member

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    As this is usually an intermittent condition, thus tough to duplicate or track down, any dealer check or clean usually cleans out your wallet more than it clears up the condition. That said, just bring in your video/audio clip and play it for the service manager.
     
    #29 Air_Boss, Oct 5, 2017
  10. Air_Boss

    Air_Boss Senior Member

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    As this is usually an intermittent condition, thus tough to duplicate or track down, any dealer check or clean usually cleans out your wallet more than it clears up the condition. That said, just bring in your video/audio clip and play it for the service manager.
     
    #30 Air_Boss, Oct 5, 2017
  11. Air_Boss

    Air_Boss Senior Member

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    As this is usually an intermittent condition, thus tough to duplicate or track down, any dealer check or clean usually cleans out your wallet more than it clears up the condition. That said, just bring in your video/audio clip and play it for the service manager.
     
    #30 Air_Boss, Oct 5, 2017
  12. Air_Boss

    Air_Boss Senior Member

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    As this is usually an intermittent condition, thus tough to duplicate or track down, any dealer check or clean usually cleans out your wallet more than it clears up the condition. That said, just bring in your video/audio clip and play it for the service manager.
     
    #31 Air_Boss, Oct 5, 2017
  13. Air_Boss

    Air_Boss Senior Member

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    As this is usually an intermittent condition, thus tough to duplicate or track down, any dealer check or clean usually cleans out your wallet more than it clears up the condition. That said, just bring in your video/audio clip and play it for the service manager.
     
    #32 Air_Boss, Oct 5, 2017
  14. Air_Boss

    Air_Boss Senior Member

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    LOL, sometimes more frequent than intermittent...
     
    #33 Air_Boss, Oct 5, 2017
    jtv, lsp61, bisco and 1 other person like this.
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