No you don't have to, you could get a replacement from honda, but may times it is easier to find another distributor, and probably cheaper. I am only saying that if you have another distributor, give that a try to diagnose the problem first. Even if you have a freind that has one, borrow his and try it out. If you want specific info on how to test the sensor try a helms manual. I would first diagnose the problem, and make sure that your timing belt is aligned properly, before worrying about replacing stuff.