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Thread: 2009 F-150 5.4L Controller Unlocker x7f Service Not Supported In Active Session

  1. #1
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    2009 F-150 5.4L Controller Unlocker x7f Service Not Supported In Active Session

    Can anyone tell me if this ECM is locked? Or do I just need an update of some sort? I am running Version 3.4.18.

  2. #2
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    That's a super old version of the software, I'd suggest upgrading to the latest version (3.4.89 as of today) first and seeing if the issue is resolved.
    ~Erik~
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  3. #3
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    I will try that today. Thanks!

  4. #4
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    Didn't work. I emailed support.

  5. #5
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    Ah dang, hope they get you squared away!
    ~Erik~
    2013 Sonic RS - manual, CGM, 6M, sunroof, mods in process
    2008 TrailBlazer 3SS AWD LS2, loaded, dropped, modded, SE22 Performance tuned. And then some...
    2002 TrailBlazer LT 4WD 4.2L I6, lifted, tires, exhaust, SE22 Performance tuned

  6. #6
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    Did support get back to you? I have a 2010 5.4 F150 same scenario.
    2002 6.6 TR6060 ZO6 (520Whp)
    2014 Audi S7 (730whp)

  7. #7
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    Whatever became of this? What was the issue?

  8. #8
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    battery/wiring related issues is almost always the cause for x7f errors such as this.
    It doesn't have to be perfect, it just needs to be done in two weeks...

    A wise man once said "google it"

  9. #9
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    Can an x7F error be caused by unsupported vehicles too?

  10. #10
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    Quote Originally Posted by pontisteve View Post
    Can an x7F error be caused by unsupported vehicles too?
    Typically no.
    It doesn't have to be perfect, it just needs to be done in two weeks...

    A wise man once said "google it"

  11. #11
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    Quote Originally Posted by Bill@HPTuners View Post
    battery/wiring related issues is almost always the cause for x7f errors such as this.
    I have this PCM on the bench with a constant 13.5v. I've had this issue for some time on 09 - 10 F150 PCMs, and thought it was related to HPT and that PCM. Or possibly to my bench harness pinout. But today, I was able to get it to read and write. It's something with my bench harness power supply adapter (pass thru connector).

    Bill, could you give me a little more insight into exactly what that x7f error means? Like which pin is it looking for something to happen on?
    Last edited by pontisteve; 11-22-2019 at 04:58 AM.

  12. #12
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    What was the remedy or final details on this ?? same issue here

  13. #13
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    Any updates? I'm having the same issue on a 2018 F150 5.0