07 Prius 'vibrates/shakes" when engine is running at low RPMs.

Discussion in 'Gen 2 Prius Technical Discussion' started by Mase, May 13, 2020.

  1. Mase

    Mase Junior Member

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    Hello,

    I recently got my first Prius 2007 (and car) about a week ago. I'm still getting used to driving this vehicle, but today I got a yellow engine check light.

    I was on a slight upward grade and was using the electric motor and then I depressed the pedal a bit more so then the engine kicked in too. I noticed the car shaking or rumbling/vibrating and after about five seconds the yellow check engine light came on. When I gave it some more gas, it stopped or wasn't nearly as noticeable and the light went off.

    Let off the pedal a bit. And it did it again.

    I was on a delivery so I pulled into my destination, made my delivery, got back in the car and plugged in my OBDII but couldn't get the light to come back on and couldn't see any codes.

    (I've been driving this car for a bit more than a week and 800 miles, and haven't got the light before)

    Anybody know how I should start troubleshooting this issue? I just had it checked at the Toyota dealer today before this happened and their $200 multi point inspection did say it was time for new spark plugs, among a few other things.




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  2. Mase

    Mase Junior Member

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    Car has ~128,000 miles on it right now. Battery was replaced at 109857 with a non OEM battery (Toyota dealer didn't bother trying to figure out what kind. All I know is it has a "black case" instead of a green case.)
    Dr Prius app says it is in good condition at 78.24%


    Here is the dealers recommendations IMG-20200513-WA0002.jpeg

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    #2 Mase, May 13, 2020
    Last edited by a moderator: May 13, 2020
  3. TMR-JWAP

    TMR-JWAP Senior Member

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    You most likely have a misfire at low rpm. Several possible causes. Was the check engine light flashing?
    Did the dealer read any codes present?

    Dealer=$755
    DIY=<$100 and an afternoon.
    Cabin air filter $15 and 3 minutes.
    Engine air filter $15 and 5 minutes
    Drive belt $10 and 1 hour for a rookie..
    Tire rotation...eh..whatever..
    PCV....$10 and an hour for a rookie...don't use an open end wrench or you may crack the valve cover
    Cleaning throttle body and MAF sensor...$10 for a can of MAF cleaner and an hour for a rookie
    Spark plugs..$30 for new plugs, and an hour for a rookie..
     
  4. edthefox5

    edthefox5 Senior Member

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    Th oem 12 volt battery has a black case. I assume you mean the 12 volt battery.

    Needs plugs. When I did mine I also replaced the coil on plug (cop) igniters too. I bought one every few months in anticipation of replacing them.
    They are a high maintenance item. use oem only.If your using the car for delivery dont go cheap on the maintenance.


    It will also need a new valve cover gasket. When you go to replace the plugs see if they have a burnt edge on the porcelain thats oil seeping thru the valve cover gasket getting into the spark plug well. Really common issue on 4 bangers. When they really start to leak they foul the cop. Then when valve cover is off you can easily take the pcv valve off with a deep socket. Do not use a open end wrench.

    Its a 13 year old high tech little car its a must to have techstream software to maintain it and keep an eye on the hybrid battery. Bad hybrid battery is the number one reason people sell a G2.
    That and its a little oil eating monster.

    use the search forum tab up top and search

    techstream you weill see many choices for obd software.

    And lastly many G2 prius suffer oil eating issues especially if oil changed at the dealer through its life. Check the oil first thing in the morning before starting the car every few days to get a sense on how much oil its eating. keep it at the full line always. You run the oil real low on that little motor its doomsday fro your wallet.

    In fact the check engine light might be on because the oil is very low now. Also replace the water pump belt. Its way overdue. You lose that $10 belt the motor will over heat you will never know till its too late.

    Pictures of part numbers for plugs and the cop:
     

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    #4 edthefox5, May 14, 2020
    Last edited: May 14, 2020
  5. fotomoto

    fotomoto Senior Member

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    Intermittent misfires: suspect plugs first and COPS (coil on plugs) second. USE NAME BRAND/OEM for both of these if possible and skip the cheap aftermarket coils as quality control is very sketch.

    GOOD LUCK!
     
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  6. Mase

    Mase Junior Member

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    Yes, I am pretty sure it was flashing.

    Dealer didn't say they read any codes (but that was before the issue accured)

    No, sorry. I was referring to the HV battery. I figured the dealer would look at the cells and try to identify it, but all they sent me was this picture (attached). Which wasn't any news to me.

    As for the oil, just checked and it looks good (around 80%)
     

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  7. TMR-JWAP

    TMR-JWAP Senior Member

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    That makes I easy..there is only ONE thing that gives a flashing check engine light...severe misfire

    Misfires are most commonly caused by worn spark plugs, bad coils, bad fuel injectors or vacuum leaks.
     
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  8. Mase

    Mase Junior Member

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    Yep, sounds about right.

    Now I've finally got the codes too. Cylinder 3 misfire. Hopefully a new spark plug will fix that issue, if not I'll try the COP next?

    As for the second issue, I'm not sure if that is a symptom of the misfire or not. Any input there would be appreciated. Screenshot_20200514-175803.jpeg

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  9. Mase

    Mase Junior Member

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    And to update, tried starting the car again and it was really bad. Says at least three misfires. Is it still spark plugs, or something else Screenshot_20200514-182530.jpeg

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  10. chelvis

    chelvis Member

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    I had a similar situation a few weeks ago @ 183K miles. Spark plugs were done, I also swapped out the coils too. Problem solved.
     
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  11. edthefox5

    edthefox5 Senior Member

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    been there so many times playing whack a mole with a cop on other cars.

    The OEM toyota cops are expensive but my G2 bought new has been very good to me so It deserves whatever I can throw at it. If it was a pain in the tookus I would have got rid of it a long time ago but nothing has really failed on the car its been all basic maintenance and hyper vigilance on the oil quality, level, and R&R interval has resulted in a G2 that does not eat oil between 5K oil changes now at 160,000 miles.

    Wife loves it and I love it because I no longer care what she runs into anymore body wise. I really should hang 2 big tug boat fender bumpers over the front of the car...lol....

    One night a year ago I see 2 police officers walking up my driveway on my surveillance camera. Its 8 at night. Oh crap...

    I go out and they ask my name and do I own a prius. I say yes where is it i say wife is out shopping in it. Long silence....they look at each other then me and there not saying anything then finally I kinda freaked out and yelled what is it is she ok????

    They say someone called the plate in and said the driver was drunk and ran over some trees in a planter in a Publix parking lot. I said shes not drunk just cant drive in the dark. I get her on the phone on speaker she starts screaming about someone cut her off in the parking lot and forced her up on a big planter and she ran over something....

    Both cops look at each other turn and walk away shaking there head.

    Fender smashed in and front of bumper all scraped to hell. I never fixed it. Runs ok. Waiting for her to take the other side out.
    And no more driving in the dark for her.

    Getting old is a blast!!!
     
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