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Thread: P0454 CEL came back on

  1. #1
    Potential Tuner
    Join Date
    Feb 2017
    Posts
    2

    P0454 CEL came back on

    Three months ago I got a P0454 "EVAP Emission System Pressure/Sensor Switch Intermittent" CEL out of nowhere on my '15 Mustang GT. I cleared it and checked things out and found nothing out of the ordinary. Fast forward to 3 months later and I went to check my ngauge and it came on again today. I'm lost on what to check for. I searched online and there is a Ford TSB for that same code and it talks about a PCM to the latest calibration. I'm also tuned and run a Paxton Supercharger. Question is... if I take it to the dealer and flash it back to stock and they then flash the PCM to the most current calibration according to the TSB, can I flash my custom tune after that or will I run into issues? Lastly, is my tuner able to disable the P0454 CEL in my tune? Thanks
    Last edited by Jeff_oddo; 02-01-2017 at 09:45 PM.

  2. #2
    yes, he is able to shut off that code in the tune

  3. #3
    Potential Tuner
    Join Date
    Feb 2017
    Posts
    2
    Thank you very much.