Engine Error Messages Table 7-6. Engine Error Messages 404 Chapter 7 Troubleshooting C4085-91087 Control Panel Message Event Log Error Message Description Recommended Action 13.1 PAPER JAM CHECK RIGHT DOOR 13.1 zz Paper feed 1. Paper l did not reach PS2. ate jam. Paper Use the “Paper Path Test” on page 80 to see if a problem exists from both engine trays. If PS2 is bad, it will fail when printing from Tray 2 or 3. Verify flag movement by manually inserting paper in the sensor path. Replace PS2 or the Paper Input Unit (PIU) Assembly. See “Paper Input Unit (PIU)” on page 206 for instructions.