Hi Bro,

From what I know, error 01 is because the lens and body lost contact. Does the body shows the same error message with other lens? If not then it could be that your lens contact point is dirty. If yes, then the body contact point is dirty.

From my experience as a computer techie, you can try using alcohol with cotton bud and clean the contact points.

p/s: Do this at your own risk. Please do it carefully & do not spill any alcohol in the body or lens.

You can call canon and inquire the pricing, better yet bring the item there for them to check. They will quote you an estimate price. If you decide not to do, then there will be no charges.