So these are some of the reasons due to which Canon printer says offline.

Due to the connection error: Improper connection or no connection between the computer and Wifi router may break off the connection between printer & wi-fi router causing ‘offline’ error.So make sure that the connection between printer and computer is made properly.

Issues with the USB: A poor connection between the printer USB & the computer due to loose wiring may result in ‘Offline’ error.Therefore make sure that the papers are properly inserted in the Machine. Inappropriate paper feeding: The jamming of the printing sheets in the Canon printer is a common cause due to which you may face ‘Offline’ error.Printer spooler error: A technical error in the printer spooler maybe the cause of this offline problem.Use Printer Offline Enable – Offline Status option not disabled that’s why printer may be goes in offline state.

Therefore you need to make sure that your printer is selected as ‘Default Printer’.

Default settings issue: Wrong default printer settings may be the reason due to which your Canon printer goes offline.

The common reasons for this problem are described in brief below: Canon printer shows offline error occurs when the printer is unable to receive any print commands from the system.

Canon mp490 printer offline mac