My 2011 Ford fusion RPMs keep dropping and I can feel it like it is going to die

Bud101, It needs to be connected to a professional scanner, not the little code reader you're describing. I'd recommend taking it to a certified shop in your area who has the proper equipment. There is a link below where you will find several in your area. http://repairpal.com/ford-within-10-miles-of-lewisville-texas-75067