!!
critical HP
Error Code Er06
Paper jam error — continue removal steps provided by service or support guides.
? What Causes This
Previous error not fully resolved, requires attention and intervention from tech support.
✓ How to Fix It
Refer official troubleshooting guide for model-specific paper jams.
Source: page 2 of the official manual
From the manual
This error code appears in:
HP Laserjet Mfp M139e M142e Printer