Fellow community members; My canon mg7520 now prints consistently since I installed a new print head! I noticed during a recent printing, for a few pages, that very little ink appeared. I purchased a new print head on Amazon, came from China of course, $36, and installed it yesterday. Once installed, it called for 5 of the 6 cartriges to be replaced over a period of about 20 minutes while I was going through 3 cycles of maintenance. I used a lot of ink, but it required a lot to start printing the colors properly. I printed out 2 more cycles this morning and the printer is getting very close to the correct colors. The main thing, it now prints!!! I've printed a least 100 pages and no problems. So, the B203 code is at least referring to the print head but may also refer to some other problems. I hope this helps. After some frustration, with this printer, I did order a canon TS8220 before the new print head arrived, so now I have a back up if this one goes south again.The TS8220 had some of the best reviews
