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Thread: Rear Air Suspension

  1. #1
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    Rear Air Suspension

    Yes its me again LOL, from one thing to the next, Trying to make this car perfect and 100% code free. I've got a rear air suspension code U1026 Invalid or missing data for engine RPM. its a pending code and doesn't set a light and the suspension works fine, just wondering if anyone else has encountered this, cant find anything on the codes diag procedures. Honestly if I dont figure it out I dont care, it doesn't affect functionality or set a light. Thanks

    2003 Black 300A #3545 DOB 8/14/2002

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  2. #2
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    Clear the code and see if it comes back. Seems to be a communications error in the PCM when it can't find what it's looking for. "PCM fart" I think I saw someone write. If it comes back make sure all your connections are good. Google the code for more possible place to look as well.

  3. #3
    Join Date
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    air suspension code U1026: It can occur if: Someone changes a battery while the ignition switch is left on, that is, left in the “Run” position. Someone flashes/upgrades their engine controller – other modules unable to communicate with PCM during this process – this will set U1026 at a multitude of controllers on the vehicle – all false codes.

    WLB
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