warning HP

Error Code Control panel message types

Indicates various error states communicated through the control panel interface, including low supplies notifications and hardware faults.

? What Causes This

Issues with print supply levels or malfunctioning hardware components can trigger these messages.

How to Fix It

Resolve by replacing cartridges when indicated as very low; follow specific recommendations provided for each type of code/message displayed.

Source: page 169 of the official manual

From the manual

Manual page 169 — HP error Control panel message types

This error code appears in:

HP Laserjet Enterprise 600 Printer M602