I have a 2000 plymouth Neon and I replaced the timing belt and all but I got it running and it wouldn't idle will I drove it down to Advanced auto to check the codes well I got something about air sensor manufacture malfunction or something like that well now my car wont start it says Camshaft position sensor bank1 circuit malfunction. I replaced the Magnet on the cam and also the sensor it still won't start please help.............................

 

are you sure the timing belt is in properly and not off a tooth or two?

 

It does sound like the belt may have slipped out of position when you put it on.