I am working on a 2004 Ford F150 5.4 Triton. We are doing a phaser delete on it. I do several of these a week and have not had any trouble until today. I went into and disabled the variable camshaft as I always do. When I did the flash about halfway thru it failed and showed writer transfer x75 negative response code. The alarm system and dash lights are working but nothing else is. Is there a fix to this or am I going to need a new pcm? Vanessa