Lexmark CX510
This option lets you type a message that will be sent with your scanned attachment.
An “Invalid Engine Code” error message indicates a problem with one of the internal operating programs of the printer. The printer is not able to receive, and process print jobs until the printer is reset.
Here are steps to troubleshoot an intermittent 121.16 Fuser Error message on a Lexmark CSx10, CXx10, C2132, or XC2132.