The Canon MG6821 printer error B203 is one of the most common errors. Whenever the printhead is damaged, or due to the recent firmware update, it happens. Due to this, you’ll not be able to perform the task that you were doing. Refer to these steps to fix the Canon MG6821 printer error B203.
Whenever the Canon PIXMA MG6821 printer comes with an error code B203, you’ll have to perform a power cycle. By performing a power cycle, you’ll be able to fix the printer error B203. Check this section to perform a power cycle.
Additionally, check whether the ink cartridge is properly installed inside the Canon PIXMA MG6821 printer. You might also have to replace the ink cartridge immediately.