Engine had an overheat condition,corrected that, engine ran fine . Then it started a slight surging while accelerating.It stalled at a light but started right up. While driving home CE light came on and shift indicator [square] was on N and D at the same time . OBD-II code P1345 indicated camshaft sensor failure. Next a.m. it would turn over but not start.I want to change this and the crank sensor.I have purchased both sensors but I am not sure where they are located.This is the 2.5L FI V-6 your help will be greatly appreciated.P.S.vehicle does have a new fuel pump,cranking pressure 50Lbs.