How to resolve Error 1668 on Canon Printer? The best way to solve Canon Printer Error Code 1668 is to manually reset the ink level on the printer. You can follow the steps below to complete the reset process and resolve Error 1668: • Step 1: Press ‘Start’ on your PC and go to the ‘Control Panel.’ • Step 2: Click ‘Hardware and Sound’ and go to ‘Devices and Printers’ • Step 3: Select ‘Maintenance Program’ and go to the Printer Preferences • Step 4: Press the radio button to disable the ink level warning and save the changes. If you find that Error 1668 still appears you can call the canon printer customer care phone number and consult a qualified printer expert to get additional troubleshooting solutions to resolve the error.