Solution
The most common cause of these error codes is the incorrect stacking of paper in the optional 2000-sheet tandem tray.
To resolve this issue, properly stack the sheets of paper on both sides before inserting the trays.
Note: Make sure that no paper is in contact with the Paper stack end guide (A).
If the 167.54 error message does appear, turn off the printer and turn it back on.
If the issue remains, please contact customer support for further troubleshooting of this issue.