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Thread: Code P0882 BMW 328xi, limp mode

  1. #1
    Join Date
    May 2022
    Location
    Massachusetts
    Posts
    3
    My Cars
    2014 BMW 328xi

    Code P0882 2014 BMW 328xi, limp mode

    Hello,

    I have a persistent issue in my 2014 BMW 328xi where code P0882 "TCM Power Input Signal Low" will activate if I start the car shortly after it has been driven for awhile. If it's a cold start I will not get the code. The issue is very reproducible.

    I've checked the battery: 12.6V engine off, 14.86V engine on.

    After an extensive online search I think the problem could be with a relay that fails when it gets hot. I'm just not sure which relay to change. I know the TCM has a fuse but I don't think failing when hot is a failure mode for a fuse.

    Thanks in advance for your help!
    Tom
    Last edited by tvc310; 05-13-2022 at 09:18 AM. Reason: updating model year of vehicle

  2. #2
    Join Date
    Jun 2002
    Location
    Aberdeen, NC (yes, again)
    Posts
    23,673
    My Cars
    E39M5, E500 4WD
    Diagnosing a BMW using P-codes is highly counterproductive. I highly recommend that you take the car to a BMW specialist shop (or dealer) which uses ISTA, BMW's diagnostic computer, and have a test plan run on the actual BMW codes.

    The actual problem may be cured by something as simple as updating the car's software. P codes are emissions codes, not for diagnosing a BMW.

    Chris Powell
    Racer and Instructor since, well. decades, ok?
    Master Auto Tech, owner of German Motors of Aberdeen
    BMWCCA 274412
    German Motors is hiring ! https://www.bimmerforums.com/forum/s...1#post30831471

  3. #3
    Join Date
    May 2022
    Location
    Massachusetts
    Posts
    3
    My Cars
    2014 BMW 328xi
    Thank you for the reply!

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