Does anyone know how hard of a job it is to replace a cam sensor on 98 Contour SE 2.0 4 cylinder

On a 96 dohc you just take off the air inlet and it's right there on the back side rear of engine. It's held on by one bolt, about a #40 torx, I believe

Welcome .

This should help.
http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=trouble&Number=1243881&Forum=trouble&Words=p0340&Match=Entire%20Phrase&Searchpage=0&Limit=25&Old=1year&Main=1243875&Search=true#Post1243881