Are you facing Canon Printer Error Code 990? Then you have landed at the right place to get the best guidance by the Canon printer technical support team. This error code in the Canon printer occurs due to the waste toner sensor detection problem. You faced this problem while doing the printing session with your Canon printer. You need not worry our support team is here to help you. In this blog, we are explaining how to fix Canon Printer Error Code 990 easily. All you need to do is follow the below-given steps to remove the error from the system quickly.