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Thread: Negative response code 07 F150

  1. #1
    Potential Tuner
    Join Date
    Aug 2013
    Posts
    3

    Negative response code 07 F150

    The m very new to tuning even though I?ve owned it for years I?ve only done a few GM ecms and made a few changes. This is my first Ford. When I go to write the ecm I keep getting a x7f negative response code. I have written the factory software to this ecm before.
    Last edited by demag; 09-14-2020 at 01:03 PM.

  2. #2
    Advanced Tuner
    Join Date
    Sep 2010
    Location
    FL
    Posts
    374
    It's not unlocking your PCM. What version of the software, and what HPT device are you using?