TPMS reciever

[Fischerj00]

I have an 08 f250 with a 6.4, leveling kit in the front, stock Ford 20" wheels with BFG All Terrains with band sensors. I don't get a low tire waring, i get a pressure sensor fault. Took it to the ford dealer 6 times. Second to the last trip they told me that the left rear sensor was bad and replaced. ame problem 20 miles later. Took it to another dealer and they told me that both of the rear sensors needed to be replaced. i told them i would have to wait. about a month later i took the truck to Les Schwab to have the tires rotated. i had them check them before they started and found that both rears were not registering. after rotating the tires that were on the rear and now on the front register and the ones on the front now on the rear that did work now longer register. one other thing i have noticed is that with the keyless entry keyfob i have to be in front of the truck and within 10 feet. i have replaced the battery in the unit and am having the same problem with both keyfobs. is there an antenna on the truck somewhere that receives signals from both of these. thanks for the help