You can go ahead ahd poll everyone... I don't recall anyone replacing cam position sensor... The computer must match both sensors to calculate the ignition... if one or ther other is bad, it will simply register whichever one is out of bound.
CPS has tricky half life problem... it works and it temporarily stop working. Look, if yours is original, you are gonna have to change it sooner or later... I'd rather not be stuck by the side of the road.