Had a rough cold start with violent knocking/shaking.

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Ethan Waldman, Feb 27, 2017.

  1. Ethan Waldman

    Ethan Waldman Junior Member

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    2011 Prius
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    Like many in this forum, I just experienced the rough cold start for the 2nd or 3rd time in my 2011 Prius (71k miles). It happens rarely, but when it does it sure is startling! I just missed capturing the sound on my phone.. by the time I got it out of my pocket and unlocked the knocking was done.

    The engine didn't throw any codes, but this seems really consistent with the conditions described in T-SB 0012-10 (I had moved the car to a closer parking spot and it started breifly but didn't warm up. Then it sat for 2 days).

    With no engine code, and no recording, do I have any recourse with my local Toyota dealership to get this fixed? Is this problem going to get worse/cause damage? What can I do?
     
    #1 Ethan Waldman, Feb 27, 2017
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  2. Tande

    Tande Active Member

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    Probably not / maybe / not much.....:(
     
    #2 Tande, Feb 27, 2017
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  3. Mendel Leisk

    Mendel Leisk Senior Member

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    Same story here: only had this once, after engine had run just a few seconds, then car sat for a day or so. When it was shaking, shutting down and restarting stopped the behaviour for me.
     
    #3 Mendel Leisk, Feb 27, 2017
  4. bisco

    bisco cookie crumbler

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    idk whether they will help you, depends on whether or not toyota states that they have to experience it, or take your word for it.
    but either way, the new manifold hasn't proved to solve the problem.
    we don't know if it will do long term damage, but the best thing for you would be to not shut the car down when it's warming up.
     
    #4 bisco, Feb 27, 2017
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  5. paprius4030

    paprius4030 My first Prius

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    If it does it again hold your foot/accelerator to the floor it makes it stop sooner.
     
    #5 paprius4030, Feb 27, 2017
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  6. Spindifferent

    Spindifferent Member

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    Had this same thing happen twice with my 2010 with 86k miles. Both events separated by a couple years. No rhyme or reason to it. I just turn off the car and then turn it back on again, and all is good. Very strange...
     
    #6 Spindifferent, Feb 27, 2017
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  7. WolfB

    WolfB Junior Member

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    2012 Prius V - rough start periodically over past 3 years. Vehicle generally garaged. Recently not garaged. Rough start more common. Smell of antifreeze in vent system. Finally throwing a code. In ship now for analysis
    Head gasket and maybe head itself need replacement. 182,000 miles. Like the vehicle. Estimated cost $2,500. I think I'm getting a good deal on repair. Time will tell
     
    #7 WolfB, Mar 4, 2021
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