I don’t know if any of you fixed your problem. But I myself had a TS8160 Canon printer where the cartridge carrier was stuck to the right position.
What I did that worked…
1st: Unplugged the printer completely.
2nd: Look at the white circular gear on the left hand-side and rotating it clockwise until I heard it click once… (checked the carriage - still wasn’t budging)… then kept rotating the gear more until I heard it click again… and then wah-lah… the “cartridge carrier” was released when I moved it to the left!
Next step is I have to clean the cartridge head. But with that… I think I have to go find a video tutorial. lol. Hope this helps someone!