Canon W6400 error 'Check MT Cart' E02816

If you used a non-cannon refill, the cartridge may not have the microcontroller inside to tell the printer the ink level.

Use replacement cartridges from Cannon or SOPHIA GLOBAL (available from Amazon or ebay).

the maintenance
cartridge is where the waste ink goes, and can be replaced by ordering
the MC-01 from the dealer you buy your ink tanks. The maintenance
cartridge is located on the front bottom of your printer, when you
remove it, be careful not to tilt the cartridge, as it is full of ink

the maintenance
cartridge is where the waste ink goes, and can be replaced by ordering
the MC-01 from the dealer you buy your ink tanks. The maintenance
cartridge is located on the front bottom of your printer, when you
remove it, be careful not to tilt the cartridge, as it is full of ink

the maintenance
cartridge is where the waste ink goes, and can be replaced by ordering
the MC-01 from the dealer you buy your ink tanks. The maintenance
cartridge is located on the front bottom of your printer, when you
remove it, be careful not to tilt the cartridge, as it is full of ink

the maintenance
cartridge is where the waste ink goes, and can be replaced by ordering
the MC-01 from the dealer you buy your ink tanks. The maintenance
cartridge is located on the front bottom of your printer, when you
remove it, be careful not to tilt the cartridge, as it is full of ink

the maintenance
cartridge is where the waste ink goes, and can be replaced by ordering
the MC-01 from the dealer you buy your ink tanks. The maintenance
cartridge is located on the front bottom of your printer, when you
remove it, be careful not to tilt the cartridge, as it is full of ink

the maintenance
cartridge is where the waste ink goes, and can be replaced by ordering
the MC-01 from the dealer you buy your ink tanks. The maintenance
cartridge is located on the front bottom of your printer, when you
remove it, be careful not to tilt the cartridge, as it is full of ink

the maintenance
cartridge is where the waste ink goes, and can be replaced by ordering
the MC-01 from the dealer you buy your ink tanks. The maintenance
cartridge is located on the front bottom of your printer, when you
remove it, be careful not to tilt the cartridge, as it is full of ink

Replace the filter located at the bottom

To reset the 'MT CARTRIDGE FULL SOON' error.
Enter Service mode Hold down the paper source and online button at the same time, hit the power button once.Continue to hold down the paper and online buttons until you see the printer name "Canon W6200" on the printers LCD display, then release the two buttons.The printer will initialize & enter service mode.
In service mode, scroll sideways until you see the 'Initialize' menu, scroll down to 'W-ink', and press enter. At this point I did something (scroll sideways and hit enter I think) and it came up with 'New W-ink Cart' Hit Enter to get '=New W-ink Cart' and Online to Accept. I powered down and back up, error all clear.