AI Overview Canon Error 5100 means the print head carriage can't move freely along its track, most often because something is physically blocking its path — paper debris, leftover packaging, or a foreign object. Clearing the obstruction and restarting the printer resolves the vast majority of cases, and it rarely points to a serious hardware fault. Quick Answer Error 5100 means the print head carriage is physically obstructed and can't reach its home position — it's a mechanical block, not an electronic failure. Open the printer and check the carriage's entire range of motion for paper scraps, packaging material, or foreign objects. Once any obstruction is cleared, a full power cycle typically resets the error and restores normal printing. Canon Error 5100 looks alarming since it halts the printer entirely, but it's actually one of the more mechanically straightforward Canon errors once you understand what it's telling you. This specific code means th...