!
error HP
Error Code Install cartridge
No toner cartridge installed — printer requires a cartridge to operate.
? What Causes This
Toner cartridge is missing or not properly installed.
✓ How to Fix It
- Open the cartridge door.
- Insert a compatible toner cartridge.
- Close the door.
Source: page 8 of the official manual
From the manual
This error code appears in:
HP Color Laserjet Pro M255 M256 Printer