intermittent Code - Coil Group 2
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Cadillac Seville / Cadillac Eldorado Forum Discussion, intermittent Code - Coil Group 2 in Past Cadillac Vehicle Discussion; I keep getting an intermittent code. When I check the codes, even though the "check engine" light is on, the ...
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    Yaemish is online now Cadillac Owners Connoisseur
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    intermittent Code - Coil Group 2

    I keep getting an intermittent code. When I check the codes, even though the "check engine" light is on, the code is a history code and not current. The check engine will come on, stay there for a few ignition cycles and then go off by itself. A few weeks ago I had the same issue but with different codes. Any ideas? Maybe an electrical problem?

    Current intermittent code
    P1360 Ignition Coil Group 2 Control Circuit

    Past intermittent codes (have not come back since being cleared but these where current when I had checked them)
    DTC P1617 Engine Oil Level Switch Circuit
    DTC P0442 Evaporative Emission (EVAP) System Small Leak Detected

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    Re: intermittent Code - Coil Group 2

    '02 Seville ? Unplug the connectors to the ICM's. Clean with Radio Shack tuner spray. - and if you dismount the coil cassettes, the ICM's are removable, and there's another multi-pin connector on the coil cassette side of the ICM, too ........... The ICM's come out with two screws and some careful work to trip the two plastic snap locks in the cassette-ICM "tunnel".

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    Re: intermittent Code - Coil Group 2

    Thanks, I'll take a look after work. Do you think that it can be related to the other codes that had come up? Maybe everything is using a common ground?

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    Re: intermittent Code - Coil Group 2

    That's the subject of a pretty good wiring diagram search .........

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    Re: intermittent Code - Coil Group 2

    I just cleaned both ICMs and cleared the codes so I will wait and see if it comes back. I didn't take the entire cassette out just yet. I haven't noticed anything weird with how the car is running. My car does consume a bit of oil even after the ring cleaning procedure. Without a misfire code, is it possible that the boots may have some oil in them causing the problem?

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    Re: intermittent Code - Coil Group 2

    Oil is an insulator. Many Northstar owners are dismayed during a spark plug change to find some oil in one or more plug wells - pretty normal: The plug wells in the cam cover/heads are sealed with O-rings ("spark plug seal"). They tend to weep over time. Not to worry.

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    Re: intermittent Code - Coil Group 2

    I still haven't taken a look at the back cassette. On a few occasions, the "check engine" light would flash on and off rapidly as I drove. Could it be possible the the ground spring in the cassette is moving around?

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    Re: intermittent Code - Coil Group 2

    Quote Originally Posted by Yaemish View Post
    I still haven't taken a look at the back cassette. On a few occasions, the "check engine" light would flash on and off rapidly as I drove. Could it be possible the the ground spring in the cassette is moving around?
    -----------------------
    the flashing SES light is a misfire -

    it should set a misfire code P0300 -

    P0300 is a generic misfire code -
    our on-board code readers will not display WHICH cylinder/cylinders is/are misfiring -
    only that there IS a misfire -

    take the car to any large auto parts store - they will check your codes for free -

    P0301 is a misfire in cylinder #1 - P0302 is cylinder #2 - P0303 is #3 - etc -

    once you discover WHICH cylinder is misfiring - diagnosis becomes much easier -
    ----------------

    Could it be possible the the ground spring in the cassette is moving around?
    I doubt the spring is "moving around" - it IS under tension -
    but it COULD BE lots of other things -

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    Re: intermittent Code - Coil Group 2

    I don't have any misfire codes. I had reset the P1360 though,so I have to wait for it to come back on. I checked using this little ODBII Bluetooth device that I have. If I don't get the misfire code with the device, I'll have someone check it with the proper tool. Thanks

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    Re: intermittent Code - Coil Group 2

    The light came back on constant (when it flashes is is occasional and it has only happened when going up hill). My scan tool couldn't see anything but P1360. The one at AutoZone only saw P1360 as well. Is it probably a misfire though and should I just replace the casette?

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    Re: intermittent Code - Coil Group 2

    Swap the coil cassette, between the bank 1 and bank 2, and see if it sets P1359 instead of P1360.
    basscatt likes this.

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    Re: intermittent Code - Coil Group 2

    Swap the cassette or just the ICMs?

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    Re: intermittent Code - Coil Group 2

    But if I did both, wouldn't it just tell me that the cassette or ICM was bad. Is my logic correct that by swapping just the ICMs, it would tell me if the ICM is bad or if the entire cassette is bad?

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    Re: intermittent Code - Coil Group 2

    Quote Originally Posted by Yaemish View Post
    Swap the cassette or just the ICMs?
    You have to remove the cassette to remove the ICM anyway ---- Each ICM is held in by two Torx head screws and a spring plastic tang clip - under the cassette leg !

    Look real hard .................

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