Owner of a MX922 printer here - got the 1403 code. I didn't change a thing when it happened. It just happened. I'm very knowledable with technical stuff and tried all the suggestions to no avail. Nearest "Canon Authorized Repairman" is 2.5 hours awa...
I am also having this same issue. I have had my printer for a few years, but never had any issues and really didn't overuse it. Were you able to find a solution? Called Canon support and they said all they can do is give me a number to a local canon ...