There are several reasons for Resolving Canon Printer Error 6000, including a paper jam, an incorrectly seated ink tank, and more.
1- An ink cartridge is not installed correctly
2- Remove the ink cartridges and put them back
3- The paper is jammed or there is an object inside the printer.
4- Inspect the printer to confirm that there are no paper debris from a paper jam and that there are no foreign objects inside your machine
5- The printer needs to be restarted.
6- Press the power button to turn off the printer.
7- Disconnect the data cable from the printer (not applicable to Wi-Fi®, Bluetooth®, or infrared).
8- Unplug the power cord from the printer for about 10 minutes, and then plug it back in.
9- If the power cord is plugged into a surge protector, it may be necessary (for testing purposes) to plug the cord directly into the wall outlet.
10- Reconnect the data cable (not applicable to Wi-Fi, Bluetooth, or infrared).
11- Press Power to turn the printer back on, and then try printing again.
If the printer is still not working properly and the carriage is accessible, remove and replace the ink. Repeat the above steps.