Try This First

Most often, these errors (and weak parts) are caused by accumulation of Core material, binder, and debris on the print head. A dirty print head, in turn, is very often caused by a service station that is dirty and not cleaning the head properly.
The first solution to try is to clean the service station thoroughly. See Section, ’Clean The Service Station’. If this fails to solve the problem, use the troubleshooting flowchart below.