2010 Prius continues to accelerate for a few seconds after pushing down on gas

Discussion in 'Newbie Forum' started by Kerry Morris, Jun 11, 2019 at 7:43 PM.

  1. Kerry Morris

    Kerry Morris New Member

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    Good Evening fellow Prius owners!

    It’s nice to be able join this great site. I hope someone can help me on this one....

    I have a 2010 Prius, 121000 miles on the clock. Recently when pressing on the gas and releasing, the car continues to rev for a second or two longer than usual. It also sounds to me that the car is working harder than usual when accelerating.

    Does anyone have any ideas what could be causing this problem? Is it a battery health issue?

    Many thanks,

    Kerry
     
  2. jb in NE

    jb in NE Senior Member

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    You are at the time in life where an EGR cooler can be plugged. That could cause driveability issues. I would check the condition of the EGR pipes and hoses to start, and if they are ugly then clean the EGR cooler.

    The hanging revs could also indicate sticking of the throttle body. That's an easy check of that for carbon buildup which may (not as likely) cause this.

    I would also run a battery diagnostic check - Dr. Prius does this, if I recall.
     
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  3. cnc97

    cnc97 Senior Member

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    I’d check to make sure there is nothing binding on the throttle pedal. Maybe even watch the pedal PID on a scan tool if possible. I’d blame the pedal sensor first over the throttle body.
     
  4. sam spade 2

    sam spade 2 Senior Member

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    Very possibly.
    That sounds very much like one of the typical symptoms.
     
  5. kenmce

    kenmce High Voltage Member

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    I am not an expert on this. I will mention that your accelerator pedal is basically a rheostat mounted on a spring. If it were to stick or be slow to return, it would generate the first symptom you describe.

    WD40 to the rescue?...
     
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