check engine light after changing spark plugs

Discussion in 'Gen 3 Prius Main Forum' started by oliverprius, Oct 2, 2021.

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  1. oliverprius

    oliverprius Junior Member

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    Hello all,
    About the car
    2012 prius 186,000 km , averaging 3.9l/100km / 60mpg . I love this car

    2 questions
    1. Check engine light is on after changing spark plugs
    Changed the spark plugs today.
    Torqued each new plug to 156in/lbs no anti seize used
    coils were reattached and double checked connections secure
    engine sounded ok when new plugs were in not as smooth as I would have hoped.
    I will get an obd2 scanner tomorow but has anyone experienced similar?
    I am concerned because I removed the wire going to the part just beyond the first plug. I do not know what that piece is which brings me to my next question

    2. Is there a place to get a detailed diagram of the engine with all the parts labeled?

    Thank you all very much,
    Oliver
     
    #1 oliverprius, Oct 2, 2021
  2. Mendel Leisk

    Mendel Leisk Senior Member

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    First off: basic maintenance info like this should be included in Owners Manual. Anyway, that number is “close”: 156/12=13 (ft/lb). Repair manual says 15, and no mention of anti-seize, so think you’re close enough.

    attached excerpt has spark plug info. Toyota in their wisdom has spark plug change instruction in one place, and plug torque value in another section, lumped in with valve cover exploded view. :rolleyes:

    watch out: coil locator bolt torque value is also INCH/pounds. And really, you don’t need torque wrench for those, just one-hand the wrench, don’t go mad.
     

    Attached Files:

    #2 Mendel Leisk, Oct 3, 2021
  3. ChapmanF

    ChapmanF Senior Member

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    Sounds like it might be the camshaft timing control valve, seen on the last page of the attachment Mendel supplied.

    You plugged it back in, didn't you?
     
    #3 ChapmanF, Oct 3, 2021
  4. Mendel Leisk

    Mendel Leisk Senior Member

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    Not sure that needs unplugging, when doing the spark plugs. But who knows.
     
    #4 Mendel Leisk, Oct 3, 2021
  5. oliverprius

    oliverprius Junior Member

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    It doesnt need unplugging. just didn't want to damage the wiring and there was some dirt underneath the wire where it was. Yes everything has been replugged and double checked
    P0010 code came up which is saying, camshaft position actuator ciruit/open bank 1
    The code went away.
    However.
    The car is not running as smooth as before. the engine sounds ok but you can feel a vibration in your butt in the seat every second or two. Oil changes have been done on time since the car was new. Oil was changed 5k km ago.
    Thanks
     
    #5 oliverprius, Oct 3, 2021
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  6. bisco

    bisco cookie crumbler

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    what plugs and where did you get them? COUNTERFEIT!
     
    #6 bisco, Oct 3, 2021
  7. bisco

    bisco cookie crumbler

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    have you cleaned the egr circuit?
     
    #7 bisco, Oct 3, 2021
  8. Montgomery

    Montgomery Senior Member

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    I agree with bisco. Make sure you have the correct spark plugs. That could cause codes and vibration issues.
     
    #8 Montgomery, Oct 3, 2021
  9. oliverprius

    oliverprius Junior Member

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    Oem denso plugs form Toyota, code is gone. The part I unplugged was the camshaft timing control valve which is what the code was.

    Now for the second part of the question. Does anyone know where I can get a very detailed schematic of the prius enigne. Thanks
     
    #9 oliverprius, Oct 3, 2021
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