Working fine until yesterday when I tried to do an ink flush not realising one of the tanks was empty and now it has an error message.
Had to replace as I need it for my business and couldn't wait for repair. If anyone's handy at repairing stuff like this then it's a cracking printer!
Black & cyan tanks are full. Magenta is half full. Yellow is empty but there is a full bottle of ink so it can be refilled. My issue started when the printer wouldn't take the ink so that may give you a clue what's wrong with it.

Canon Pixma G5050 inkjet tank printer - faulty (Padiham BB12)