⚠
warning HP
Error Code Manual Duplex
Manual duplex printing required — printer needs paper reloaded for double-sided printing.
? What Causes This
Duplex printing requested but manual page turning is required.
✓ How to Fix It
- Load paper into tray
- Press OK to continue with duplex printing.
Source: page 8 of the official manual
From the manual
This error code appears in:
HP Color Laserjet Pro M255 M256 Printer