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Thread: Anyone know what "P1320 - IC 4X Reference Circuit Intermittent" means?

  1. #1
    sprj is offline Cadillac Owners Member
    Automobile(s): 1997 Seville SLS
    Join Date
    Mar 2005
    Location
    Detroit, MI
    Age
    41
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    Anyone know what "P1320 - IC 4X Reference Circuit Intermittent" means?

    Car is misfiring. Had same problem a year ago. Did Delco plugs and Bosch wires. Problem was solved. About three or four weeks ago, car started misfiring again. I placed a post and someone said "GET THE DELCO WIRES!" I replaced the Bosch wires because I got them warranteed for free. Problem was solved, for about three weeks. Now just a couple days ago, car started misfiring again. "P1320 - IC 4X Reference Circuit Intermittent " was the only significant code... there was a body code for 'front vertical sensor' too, but I think it is unrelated.

    I am trying to get the coilpacks tested. I don't know if I should spend the money on Delco wires, replace the coilpacks, the dock that they sit on... or maybe something else I am overlooking, ignition control module, etc? I am hoping I can pinpoint what is wrong with this thing instead of 'stabbing in the dark' and guessing what is wrong at a $100 - $250 per guess. I just don't have the money to do that.


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  3. #2
    JimD is offline Cadillac Owners Connoisseur
    Automobile(s): '98 STS (RIP @ 206,xxx miles)
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    Re: Anyone know what "P1320 - IC 4X Reference Circuit Intermittent" means?

    Remove and install each of the low voltage connectors on the ignition control module several times; this will wipe the contacts clean.

  4. #3
    sprj is offline Cadillac Owners Member
    Automobile(s): 1997 Seville SLS
    Join Date
    Mar 2005
    Location
    Detroit, MI
    Age
    41
    Posts
    50

    Re: Anyone know what "P1320 - IC 4X Reference Circuit Intermittent" means?

    Quote Originally Posted by JimD
    Remove and install each of the low voltage connectors on the ignition control module several times; this will wipe the contacts clean.
    Are these the two plugs on either side of the coilpack assembly?

  5. #4
    JimD is offline Cadillac Owners Connoisseur
    Automobile(s): '98 STS (RIP @ 206,xxx miles)
    Join Date
    Sep 2003
    Location
    Metro ATL
    Posts
    4,854

    Re: Anyone know what "P1320 - IC 4X Reference Circuit Intermittent" means?

    Yes.


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