Replaced the timing belt 2-3 weeks ago. Car ran good since. All of sudden it started to run rough and check engine light came on. It is P0340. I replaced the cam sensor but it did not correct the problem. Timing belt looks good and tight so I can imagine it could jump a tooth since it ran fine for awhile. Any place to check or look at next? Does the car need to be driven after the cam sensor is replaced? I cleared the code and ran it high idle for awhile but did not drive it.