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error HP
Error Code Install toner
A toner cartridge issue — toner not installed or detected.
? What Causes This
Improper installation or sensor malfunction.
✓ How to Fix It
- Reinstall the toner cartridge and confirm it is seated properly.
- If problem persists, contact customer service.
Source: page 94 of the official manual
From the manual
This error code appears in:
HP Laser 408 Printer