There could be a variety of reasons why your Canon Printer is not working. Still haven't figured out what's causing Canon printer offline? • USB Or Wireless Connection Is Loose And Disconnected • Changes in network or router settings can also result in printer inactivity • Slow internet connection (Frequent Connection) • The default printer for the Canon printer is not set. • Firmware Updates are available for printers and routers • Incompatible with printer drivers or virtual printers. • Error Codes of Canon Printer