HP error code Er/11
Quick answer
There is a problem with the toner cartridge itself. HP's fix: confirm the shipping tape/seal has been fully removed and that the cartridge is compatible and undamaged.
Caution: This step can be done wrong in a way that is costly or hard to undo, including voiding your warranty. Check your model's manual before proceeding.
Before you try the solution
- 1. Copy the complete message exactly as shown, including any letters, spaces, or punctuation around Er/11.
- 2. Find the printer's exact model number. The same-looking code can mean something different on another model family.
- 3. Let the current print, scan, or update operation stop before touching controls, paper paths, or covers.
Manufacturer-documented solution
There is a problem with the toner cartridge itself. HP's fix: confirm the shipping tape/seal has been fully removed and that the cartridge is compatible and undamaged.
Model scope: HP's control-panel error table for your exact model
If the error is still there
- 1Return to the screen or job that produced the message and check whether the code has cleared.
- 2If Er/11 returns, do not repeat a risky procedure. Record when it appears and check the documentation for the exact model.
- 3Because this message involves opening the printer, service risk, or possible damage, stop and contact HP support or a qualified printer technician if it persists.
Other HP error codes
- Er/14The installed toner cartridge is HP-cartridge-protection locked to a different printer and is not authorized for use in this one. HP's fix: replace with an authorized cartridge.
- Er/17A non-genuine (non-HP) toner cartridge is installed; the printer's Cartridge Policy setting only allows Original HP cartridges. HP's fix: replace with a genuine HP cartridge.
- Er/01The printer's input tray is empty. HP's fix: load paper into the tray.
- Er/02A door on the printer is open. HP's fix: verify the top cover is fully closed.
- Er/03The printer failed to pick a sheet of paper for a print job. HP's fix: press Start Copy/Resume to retry the pickup.
- Er/04Paper is jammed in the input tray. HP's fix: open the print-cartridge door, remove the print cartridge, then pull the jammed sheet straight out (never at an angle) and reinstall.
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Manufacturer reference
The meaning and documented action above were taken from the manufacturer source below.
HP LaserJet MFP M139-M142 series User GuideVerified against manufacturer documentation, last checked 2026-08-13. PrintDiag has no printers and no technician, so nothing here is claimed as tested on hardware.