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2016 toyota prius C two engine revving noise while driving

Discussion in 'Prius c Main Forum' started by BeeForToyota, Aug 22, 2024 at 7:09 PM.

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  1. BeeForToyota

    BeeForToyota Junior Member

    Joined:
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    Two
    I purchased a used 2016 Prius C2 with 44k miles in 2021, and it now has 59k miles. Over the past year, I’ve noticed an issue where, occasionally while driving and not pressing the pedal, it sounds like the engine is revving up, almost as if it's accelerating, though the car doesn’t actually speed up. I recently changed the transmission and engine oil, thinking it might be related to the 60k-mile mark. However, I still heard the noise today. Has anyone experienced a similar issue or have any advice on what might be causing this?
     
    #1 BeeForToyota, Aug 22, 2024 at 7:09 PM
  2. ChapmanF

    ChapmanF Senior Member

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    What's the speed of the car at those times, how many bars of battery charge, and grade of the road (uphill / flat / downhill )?
     
    #2 ChapmanF, Aug 22, 2024 at 7:20 PM
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  3. BeeForToyota

    BeeForToyota Junior Member

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    Two
    Great questions. Today I was driving on a flat road, not highway, battery was at least 80%, speed was 40 miles or so.
     
    #3 BeeForToyota, Aug 22, 2024 at 7:36 PM
  4. bisco

    bisco cookie crumbler

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    That used to happen to me on one particular route. Battery wasn’t quite full, but I would get the engine revving, like it was trying to burn off charge, but I was going slow enough that it could have just gone into ev mode.
    Could never figure it out
     
    #4 bisco, Aug 22, 2024 at 7:39 PM
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