canon printer error 7800 encounters when the print head contacts are damaged due to faulty or third-party cartridges used. You can easily resolve this error by using the following solution steps given in this article. canon printer error E17 happens when the front input tray is closed or damaged. If it's related to physically damaged it can only be resolved by visiting the nearest Canon printer service center however other solutions can also be applied in case of other issues. This canon printer error 6502 occurs when the Ink tank is in the incorrect position, it stops recognizing the Cartridge at that time your printer notifies the support code 6502. For resolving this error follow the instructions given in this article. The canon printer error 099 indicates that the paper is stuck inside your printer. If you want to remove this error, you can easily eliminate it by applying the given instructions.