This error code can be produced for several reasons, such as an issue with your canon printer or its connections. In case you see canon g6020 error 5200 on your printer, it is advised that you perform each step below to see if it fixes your problem: 1. Power off your PC and printer. Press and hold down the power button for at least 20 seconds 2. Plug-in USB cable in between PC and printer if not done yet 3. Power on both devices 4. Wait until they get connected automatically (if they don't connect automatically, then try reconnecting them manually); this way, you can establish the connection.