I can smell the lawsuit is at the corner. So many people were suffering from this bogus print head problem. However, I just fix the problem by accident and found out there is tricky sensor hidden deep at the inner corner of the printer seat (the right bottom side in the printer housing). I believe canon did this on purpose, and this sensor problem never being put MX330, 450, 860, 862, 870. Besides, the error message "Printhead wrong type" is not accurately to describe this problem. The print head is very expansive, whoever in the world can be stupid enough to buy a new print head and replace the print head. the print head is very difficult to remove and put back. I hate this printer. One more time problem happens, I will dump it in the trash bin immediately. Not worthy to put my precious time on it.
I held on to mine for over a year after it died, waiting for my province to finally make it possible to recycle electronics.
I used to be a dyed-in-the-wool Canon fan. Not any more, and in addition to the Canon ip7220 which I like because of the cheap ink, at my other location I have an HP 2655 which is an all-in-one that I paid only $50 for in Canada. I signed up for the Instant Ink service and that has worked out very well for me so far.
Just got the support code 1405 on my Pixma mx922 which appears to say same thing as code 1403. Cleaned and reseated print head but doesn't fix the problem. Afraid to buy new print head and then be just out the money if that doesn't work either. I am already out a ton of money on the ink. Now need to go buy another printer along with ink because have a ton of printing need to get done ASAP. If there is a class action suit, sign me up..