check the hose as well. Canon G3000 error code 5B00 mean the waste ink counter overflow, you have to reset Canon G3000 Waste Ink Counter (clear Waste Counters). Resetting your Canon PIXMA printer to its default factory setting will restore it back to its initial time, clearing all the settings and specifications that you have made after purchasing it. How to Fix Canon Error: Ink absorber is almost full 1.