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Error 1222 but then..

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    Error 1222 but then..

    So once again, code 1222 showed up, last time replaced the distributor cap and rotor, new spark plugs and it fixed it. This time, started doing it out of no where and figured it’s probably been forever since the O2 sensor was replaced. Disconnected the battery, put a new Bosch sensor on, and per usual when I disconnect the battery, the cars engine idles erratically, but smelt super rich (my guess is the computer is adjusting to the new O2 sensor).

    That being said tried reversing and stalled out 3 times. Let the car sit for 10 minutes then tried it again, this time, the idle sat around 700 rpms (have a Dinan chip), drove it around the block and it would drop down to a near stall for a second then back up to a solid 500 rpms.

    All the while my engine oil check panel light came on but oil level seems fine. However, no more CEL, did stomp test just to be sure even after the stall out and I get 1444 (no error). And no more 1222

    Phew

    So, question is, does it take time for the 02 sensor to adjust with the DME, or do i have a whole other set of issues?

    1991 325i M20
    If I had to live my life over, I'd live over a Saloon" - WC Fields

    Garage
    1991 325i
    1972 R75/5 Cafe

    #2
    Added note,

    Ran a proper smoke test a month or so ago, no leaks.
    If I had to live my life over, I'd live over a Saloon" - WC Fields

    Garage
    1991 325i
    1972 R75/5 Cafe

    Comment


      #3
      What's the rating on you CPS? I had a 1222 and it ended up being CPS.

      Also, my TPS was out as well, I replaced both around the same time.

      When installing electrical components I always unplug the battery and the DME will reset. I usually can't hold an idle after the battery is disconnected, but after a few minutes of driving it is fine.

      Good luck! 1222 is one of the trickier ones to chase down.

      Probably worth the time to check you AFM as well.
      20% Accurate

      Morty: Well Summer maybe people that create things aren’t concerned with your delicate sensibilities you know? Maybe the species that communicate with each other through a filter of your comfort are less evolved that the ones that just communicate? Maybe your problems are your own to deal with and maybe the public giving a shit about your feelings is a one way ticket to extinction.

      Comment


        #4
        Thanks for the info! Turns out the O2 sensor was not grounding (even prior to when I replaced it), fixed the ground issue and now its running fine. Also cleaned out the MAF,ICV,Throttle Body, etc. Hopefully that should fix it for now, so far 4 days and no problems!
        If I had to live my life over, I'd live over a Saloon" - WC Fields

        Garage
        1991 325i
        1972 R75/5 Cafe

        Comment

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