There seems to be a relatively large population of Canon owners who are affected by the E18 error. In this article I will teach you a few simple methods you can try to repair the error yourself.
This article is intended for people whose cameras are out of warranty. If your camera is still under warranty, go to your nearest Canon repair shop and let them fix it. If its not, you can either choose to pay around 150$ for the repair or try one of these simple techniques.