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Thread: Reduced engine power, P2281 code

  1. #1
    Potential Tuner
    Join Date
    Jul 2008
    Posts
    9

    Reduced engine power, P2281 code

    2015 Z06, full bolt ons, 2.31/9.5 pulley combo, on E30. I got most of my throttle/tq tables straightened out but now the car will go in to REP just before 84 lb/min. There has to be something I am missing here. To add this is the most airflow I have scene since adding the lower. It has to be a table I am missing.
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  2. #2
    Potential Tuner
    Join Date
    Jul 2008
    Posts
    9
    Anyone?

  3. #3
    There is a difference in the measured maf airflow lb/min compared to the map airflow lb/min which sets the code.

    You have to tune your vve until its airflow is equal to the maf calculated airflow.

    If you want a band aid fix; max out the maf/map correlation P0068 tables under engine diagnostics under airflow and set the following codes to no error reported + no ses:-
    P0068
    P2281
    And any code that relates to TPS that show up afterwards.

    Good luck.

  4. #4
    Tuner
    Join Date
    Oct 2017
    Location
    Boston
    Posts
    62
    Curious if/how this was resolved because I had noticed you were not getting desired fuel pressures so was curious if that was also an issue or just a victim of the diag codes.

    Thanks,
    Pj