What is a Carrier Jam?

Delete the fax and check paper tray rollers are cleaned. May be missing feeding which mean roller can't grab the paper and machine is expecting the paper to be at a certain point and does not see (Though sensors though out the paper route thru the machine so it thinks there is a paper jam) Also mite want o clear the memory (SRAM/DRAM) will lose one touches so make sure you have list backup

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

The manual for the printer (downloadable from here) describes the process from pages 5-9 to 5-14

Please perform the steps mentioned in the link below:

Paper Jam

The steps would help resolve the carriage problem as well.

Make sure the paper is out where it was jammed. Unplug the printer from the wall for thirty seconds and plug it back in.

maybe there is more than 1 piece of paper jamed

simply open up your printer and see if there is any residual paper that get stuck, in some case if you can find some small miniature piece of sensor it might cause a erratic sensing that there is a presence of paper while there isnt, try to clear this or clean.
paper jamming indicator means there is some paper in the paper path, unless otherwise ou clear this up you cannnot print.
after you may need to power down or restart your printer once again
cheers 

Remove the toner, and try to gently pull out the paper jam.. If the page gets torn, or ripped, make sure you have all the pieces of the paper removed. Then re-start the printer. Print a test page to make sure the paper path is clear..

Remove the paper following the procedure below.
(1) Load a single sheet of the same paper in the Auto Sheet Feeder in portrait orientation.
Do not load it in the landscape orientation.
(2) Turn off the machine.
(3) Turn on the machine.
The paper is fed and then pushes out the jammed paper as it ejects.
If you cannot remove the jammed paper or the paper jam error continues after removing the paper, contact your Canon Service representative.

James Mac 

hi this is some small pieces of paper which had gone inside in ur printer when u prints. this one have to contact printer engineer to clean the printer

Sometimes there is little bits of paper stuck inside a sensor causing the printer to detect a jam. Use an air duster can to and shoot some air at all the sensors. The sensors look like little plastic fingers that get pushed down when paper moves over them.