Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
That error means the purge unit (under the printhead/carriage) or something associated with it, is jamming. A loose part may be the cause, or something similar. Open the printer, with the power off, and examine the parts that might affect the carriage and/or printhead, try to gently move the printhead aside, etc.
At worst, the printer may need repairing or replacing.
(How old is the printer?)
Let me know what you find, please.