Welcome to the forum, Your in the Turbo section of the forum so I take it you have a turbo. It helps to fill out your profile when asking questions so we know what year and engine you have. Also your talking in kms so I also take it your not in the U.S.A. ? If you have the 2.0 diesel engine the schedule might be different but the 2.4 petrol engine is probably the same. Do they even make a Turbo for the 2.0 ???
According to my 2001 service manual, both for severe and normal driving, the recommended change for the timing belt is 192,000 kms but we recommend to everyone that that shouldn't go over 160,000 kms. Your way below that so it might just be the camshaft sensor itself and I believe your right when you said the computer now sees everything is OK and the CEL went out. You might want to check the wiring to the sensor (right side of the engine, see pic below) and make sure everything looks OK.
