2004 Taurus no start

Ok I have an idea it is the Cam sensor but I am not sure. I used to be a Parts manager for a Ford dealer and know we used to sell alot, but not sure of the symptoms. I went out to start the car last night and it acted like it was going to start at first but now it just cranks and seems like maybe a bad timing belt. It ran fine 2 days earlier. We do live in the cold weather now but I don't see how that has anything to do with it. Can someone help? I checked all the fuses and relays for the pcm and the fuel pump but now I am out of ideas.

Thanks, Dave

A cam sensor should not cause a no start condition. Usually it sets a code P0340 and lights the check engine light. Possibly a crank sensor. Need to test for fuel or spark. Isn't it still under factory warranty?