Hello, my name is***** to Justanswer! Give me just a few minutes to look up some specifics, I'm working on this now.
Sorry for the delay, this question just came across my desk. There are sensors that go bad in printers which cause the paper jam errors when there isn't any paper jammed. This is a problem that cannot be done at home, you'll need to call Canon. Click here for their contact information. They will most likely offer you a half-off coupon for a new printer. That is generally what is done in these situations. Printers aren't built very well, and they have a very short life span.