Canon Support Code C000 means that a printer error has occurred. This error can be caused by several issues, such as failing to remove the packing material, an incorrectly seated ink tank, or an obstruction in the paper feed path.
To resolve this error, remove the packing material if it is still intact, adjust the ink tanks, or remove the jammed paper or other obstruction in the paper feed path, depending on which problem applies to the specific instance. If none of these steps clears the error, turn the printer off, and unplug the power cord from the power supply, then plug it back in and turn the printer back on. If this also fails, contact Canon customer service for further assistance.