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2010 Prius Engine Vibration

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by aarontheaccountant, Feb 7, 2020.

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  1. aarontheaccountant

    aarontheaccountant New Member

    Joined:
    Feb 7, 2020
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    Location:
    Harrisburg
    Vehicle:
    2010 Prius
    Model:
    ----USA----
    I have a 2010 Toyota Prius with roughly 218,000 miles that are mainly highway miles. I have recently had a vibration that occurs when the main engine is turned on and I input roughly 50% throttle. If I go below or above that throttle range, the engine runs smoothly. I thought it was the EGR valve but it is still occurring. I have been told that it could be the throttle positioning sensor. If that is in fact the case, I would need to replace the throttle body as you cannot replace the sensor alone.

    Has anyone else run into this? If so, what have you found to be the solution?
     
    #1 aarontheaccountant, Feb 7, 2020
  2. mikey_t

    mikey_t Active Member

    Joined:
    Feb 5, 2019
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    Location:
    Los Angeles
    Vehicle:
    2010 Prius
    Model:
    Two
    When you say, "I thought it was the EGR valve but it is still occurring", what does that mean? You had the valve replaced? Or did you clean the EGR valve, cooler, and intake manifold?
     
    #2 mikey_t, Feb 8, 2020
    Mendel Leisk likes this.
  3. aarontheaccountant

    aarontheaccountant New Member

    Joined:
    Feb 7, 2020
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    Location:
    Harrisburg
    Vehicle:
    2010 Prius
    Model:
    ----USA----
    I replaced the EGR valve but I did not clean or touch either the cooler or the intake manifold
     
    #3 aarontheaccountant, Feb 10, 2020
  4. aarontheaccountant

    aarontheaccountant New Member

    Joined:
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    Location:
    Harrisburg
    Vehicle:
    2010 Prius
    Model:
    ----USA----
    UPDATE

    We took the valve cover off and discovered that one of the spark plugs was cracked and two of the other spark plugs had a fair amount of oil on them. Also, the timing chain and timing chain guide have play in them. Replaced the spark plugs including the boots and the valve cover gasket. Vibration is still there.

    My check engine light has finally come on so I am excited to see what code or codes are brought up on the scanner
     
    #4 aarontheaccountant, Feb 10, 2020
    mikey_t likes this.
  5. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,661
    38,205
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Dibs on P0300, P0301 and P0302.
     
    #5 Mendel Leisk, Feb 10, 2020
    The Critic likes this.
  6. Grit

    Grit Senior Member

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    Aug 22, 2017
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    Location:
    Wilkes Land
    Vehicle:
    2012 Prius
    Model:
    Four
    Have coolant level been steady over the last few months?
     
    #6 Grit, Feb 10, 2020
    Raytheeagle and Mendel Leisk like this.
  7. Jeff F

    Jeff F Member

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    Oct 10, 2012
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    Location:
    London, Ontario
    Vehicle:
    2001 Prius
    Model:
    N/A
    Hey all, hope I'm not hijacking the thread. First time posting on the gen3 forum, but used to hang out in gen1.

    I just dropped my 2010 with similar mileage off at my local shop. Same story as OP, and losing coolant and getting misfire DTCs. Head gasket?

    Jeff
     
    #7 Jeff F, Feb 11, 2020
  8. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
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    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Likely. How many miles? EGR and intake ever been cleaned?
     
    #8 Mendel Leisk, Feb 11, 2020
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