(or 2 times, depending on the specific firmware version).
However, I must clarify some important points first: service tool v1074 canon mp 250 1833
The error 1833 should be gone. If the printer still shows an error, repeat steps 2–6, but also reset the counter (secondary pad) found in the dropdown menu. (or 2 times, depending on the specific firmware version)
If your Canon MP250 is showing a persistent error and you suspect a waste ink pad issue: (or 2 times