Issue Description
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.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Turn off the printer.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Leave the printer off for 30 seconds to a minute.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
With the printer off, clear any unfinished print jobs that are currently in queue.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Turn on the printer and allow it to reach a Ready state. Do not send any print jobs yet.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
If the error appears again, then continue to step 6. If the error does not appear, then the error may be an isolated incident.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Update the firmware. For more information, see Firmware Update Instructions.
If the issue persists, then search for more information related to this issue or contact customer support.