My office jet G85 has the message "remove and check color

How old is the cartridge? It may have a built-in chip that activates this message, and it may be time to replace it. The reason the fax still works may be because a small reserve is left for just that purpose in case you don't get back to your computer in time.

Check and make sure you drivers are up to date. You may need to un-install the printer software and remove the printer in the control panel. Then reboot the computer,install the software(check and see if there is updated software if so download it).Then install the software and usually gives you instructions on when to connect the printer and drivers should be installed by software. Also make sure that when you use the print screen that you have the default printer selected and that the office jet is the default printer. It may be set to print to Microsoft one note for example.