Canon MF8580Cdw User Manual page 563

The yellow toner cartridge has reached the end of its lifetime
The toner cartridge has reached the end of its lifetime.
Replacement of the toner cartridge is recommended.
How to Replace Toner Cartridges
Toner Cartridge Error Re-insert or replace the toner cartridge.
The toner cartridge is not set in the cartridge tray correctly, or the toner cartridge may be faulty.
Set the toner cartridge of the color displayed again. If the message still appears, the toner cartridge may be faulty.
Contact your local authorized Canon dealer or the Canon help line.
How to Replace Toner Cartridges
Use Remote UI to set the information necessary for authentication.
The IEEE 802.1X settings are incorrect.
Check whether [Login Name] is set correctly.
Check whether the [Use TLS], [Use TTLS], or [Use PEAP] check box is selected.
If using TLS, check whether a key pair is registered.
If using TTLS or PEAP, check whether a user name and password are set correctly.
Configuring IEEE 802.1X Authentication