Check out the steps mentioned in the guide to know about then replace the defective cartridge to start the Canon error code. Now, remove and clean the printhead with cloth piece. Reseat your printhead and check the foreign particles or debris inside the printer. Switch off the printer, lift up the printer lid, and then replace the tank holder. Press the power and copy buttons on the Canon printer. Lastly, check if the Canon printer error code is resolved or not.