What about a test page?
Have you performed a maintenance task?
Nozzle check, cleaning, etc. It can also be a defective cartridge.
Thanks for the additioanl information.
Test page - good
B&W Docs - good
Are you using Canon inks?
Tough one to solve remotely.
What types of files are you printing that come out yellow? (.PDF, .JPG, etc?
Does this happen in one application or all except document files?
Can you provide an example (image)?
Color management issue?
Paper type is also a possible problem, example you select the wrong paper type for what is loaded.
You mentioned "All of the above". Does this mean you have tried another yellow cartridge too? .