2003 Dodge 2.4L cam and crank sensors installation

Can I install these 2 sensors myself ? The cam sensor and the crankshaft sensors with 1 and 2 screws to hold them in place, are they easily accessible? Where are they on the engine? novice here. and I may need the engine wire harness replaced on this dec 2003 bought car, 65000 miles but the harness issue came up last year when the car was 2.5 years old. Isn't that odd? engine or chassis wire harness replacement at such a young age?
HELP MEEEE!

codes, problems????