U052 is a temperature sensor in the works below the cartridges. Canon can ship you the part; it's not the inks cart, but then it's not for me to say 5 minutes with the power off or 20 with either a solvent cartridge (especially on any colors with stripe dropouts) or cleaning the works and reseating flex cables won't fix it. (Take it to a Canon shop per any surviving repair warrants; it's serious enough.)
Get compensated for this defect.
Canon printer class action suit
Canon USA Inc Consumer Class Action and
http://www.federmanlaw.com/Websites/federmanlaw/images/QUESTIONNAIRE.pdf
"...at least 16 different Canon printer models have been identified that display an error message of "U052: Wrong Printhead Error," after limited use. This error indicates that the printer does not recognize the printhead, or that the printhead itself is faulty, but disables all functions of the printer, including scanning and facsimile capabilities, rendering the printer unsuitable for its intended purpose and use."
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