I have some questions to ask and hope someone can help me out.

1) does camshaft affects the the aircon system?
2) if there is a problem in the camshaft sensor, is it difficult to replace it?
3) and does it affects the charging of the car battery?

 

Welcome. The answers are no,,, and kind of yes. The cam is an integral part of the motor, so indirectly it effects everything... directly - no. Your A/C unit is belt driven and it runs off of the crank (which is connected to the timing bone which is connected to the cam bone) btw this is the same answer for the battery, its charged by the alternator whic is belt driven as well.

If your cam is stock it should all work just fine, if its an 'upgrade' then it will effect things, simply because it will cause the engine to idle differently than a stock one, but I think that if yours isnt stock you would already know this and wouldnt be asking this question..... so... the answer to 1 and 3 is no.
Number 2, we need more info on the car, year, size etc...

 

thanks for the help!!

 

the only thing it will really affect is vacuum,depending on how big you go.