I have an 05 Screw FX4 & the check engine light is coming on now. I am getting the P0453 Evaporative Emission control system pressure system high input error. I have been searched the forum & am not understanding what is being said about it. I see it is probably the FTP but am not sure what that is. Where can i find it at on my model F150? Is it on top of the fuel tank? Any help is greatly appreciated. Also I just purchased the truck about 6 weeks ago & it has just started happening. As well I installed a Gryphon a week ago, but it was happening before the install.