I have encountered this error whilst running diagnostic tests following a printhead malfunction. I replaced the trailing cable and the printer seemed to be functioning ok but the 58.11 error remained. I have now replaced the carriage pca but the ESP still fails the diagnostic test, however I was able to successfully recalibrate a paper and I have a hunch that the ESP is actually ok but there is something wrong with the test. I'm going to try a firmware update but I'd love to hear from anyone who has run into this error and successfully resolved it. The ESP is an expensive part and I don't want to get suckered into replacing it needlessly.