HP Printer Error Codes Explained: E0–E9, 49, 79 & More - PrinterTeck

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The difficulty is that HP manufactures many different printer families. An E3 code on a DeskJet inkjet does not necessarily mean the same thing as a numbered service error on a LaserJet. Even printers that look similar may use different displays, warning lights and troubleshooting procedures.

This guide explains common HP printer error codes and messages, including:

HP DeskJet E0–E9 errors
Ink cartridge and printhead messages
Ink System Failure and 0x codes
Paper jam and carriage errors
HP LaserJet service codes
Wi-Fi, offline and connection messages
Scanner and automatic document feeder errors
Safe troubleshooting steps
When a printer may require professional repair

Important: HP error codes are model-specific. Always record the full code and check it against the support page for your exact printer model before replacing parts or changing firmware.

HP Printer Error Codes: Quick Lookup Chart

Use this table as a starting point. More detailed explanations appear below.

Error code or message	Common meaning	First action
E0	Cartridge problem	Check, remove and reinstall the indicated cartridge
E1	Paper-size mismatch	Match the loaded paper to the print setting
E2	Paper-length or paper-size mismatch	Check the document and tray paper settings
E3	Carriage jam or obstruction	Inspect the cartridge carriage path
E4	Paper jam	Clear paper from every accessible paper path
E5	Scanner error	Restart and test the scanner again
E6	General printer error state	Perform a power restart
E9	Firmware or update-related state on selected models	Allow the update to finish or follow model-specific guidance
Cartridge Problem	Cartridge cannot be read or used	Check the number, contacts and installation
Incompatible Cartridge	Wrong cartridge or regional mismatch	Confirm the cartridge family and printer region
Missing or Damaged Cartridge	Cartridge is absent or not communicating	Reinstall or test a replacement
Ink System Failure	Ink delivery, printhead or cartridge problem	Inspect cartridges and restart the printer
Printhead Problem	Printhead cannot operate or communicate	Reseat it if user-removable; otherwise seek support
0x6100004a	Paper-path, carriage or mechanical problem	Check for jams and carriage obstructions
0xc19a…	Ink-system or printhead fault	Inspect cartridges and printhead, then restart
13.xx	Paper jam on many LaserJets	Find and remove paper from the indicated location
20	Insufficient printer memory	Simplify the job or add memory where supported
41.3	Unexpected paper size	Check tray guides and paper settings
49	Firmware or print-job communication error	Cancel the job and restart the printer
50.x	Fuser fault on many LaserJets	Restart once; arrange service if it returns
51.x	Laser or beam-detection error	Restart and seek service if persistent
52.x	Scanner or laser-scanner assembly error	Restart and check model-specific support
54.x	Sensor or toner-related hardware error	Check supplies and arrange service if needed
55.x	Internal communication error	Restart and disconnect accessories
57.x	Fan error	Switch off and check ventilation
59.x	Motor or drive error	Restart; inspect consumables and paper path
79	Firmware or invalid print-job error	Disconnect network/USB, restart and isolate the job
Printer Offline	Computer cannot communicate with printer	Check connection, queue and selected printer
Attention Required	Printer needs user action	Read the display or HP app for the underlying fault

Before Troubleshooting an HP Error Code

Before changing settings or buying replacement parts, record:

The complete error code
Every word in the message
Which warning lights are flashing
The printer’s full model number
What happened immediately before the error
Whether cartridges, toner or paper were recently changed
Whether firmware or software was recently updated
Whether the error appears during start-up or only when printing
Whether the printer can produce an internal test page

A photograph of the display can be useful if the error disappears after restarting.

HP DeskJet E0–E9 Error Codes

Short codes such as E0, E1 and E4 are common on HP DeskJet and similar home printers with small segment displays.

The exact interpretation can vary, so use the following explanations as a guide rather than assuming they apply universally.

HP Printer E0 Error: Cartridge Problem

An E0 error commonly indicates a problem with one or both ink cartridges.

Possible causes include:

The cartridge is not installed correctly
The cartridge number is incompatible
Protective tape remains attached
The electrical contacts are dirty
The cartridge is damaged
The printer cannot communicate with the cartridge
The cartridge is intended for another region
A previously used cartridge has failed
Firmware cannot recognise the cartridge

How to fix HP error E0

Open the cartridge-access door.
Wait until the carriage stops moving.
Identify the cartridge indicated by the flashing Ink Level icon.
Remove that cartridge.
Confirm that its number matches the printer.
Remove any remaining protective tape.
Inspect the copper-coloured electrical contacts.
Reinstall the cartridge firmly.
Close the access door.
Wait for the printer to complete its check.

If the error remains, test another suitable cartridge if one is available.

Avoid touching the ink nozzles or copper contacts with your fingers. Oils and dirt can interfere with communication.

For help finding the correct cartridge, use our HP Ink Cartridge Compatibility Chart UK.

HP Printer E1 Error: Paper-Size Mismatch

An E1 error commonly means that the paper width detected by the printer does not match the size selected in the software.

For example, the printer may contain A4 paper while the document or driver is configured for Letter paper.

How to fix HP error E1

Check the paper loaded in the input tray.
Move the paper-width guides against the paper without bending it.
Open the print dialogue on the computer or mobile device.
Select the correct paper size.
Confirm the same size in HP Smart or the printer settings.
Cancel the failed job and print it again.

For UK printing, check carefully whether the document is set to:

A4
A5
10 × 15 cm
Letter
Legal
Another custom size

A4 and US Letter are not identical.

HP Printer E2 Error: Paper-Length Mismatch

An E2 error usually means the paper length detected during printing does not agree with the print-job setting.

This can be caused by:

Incorrect paper-size selection
Paper loaded in the wrong orientation
Multiple sheets feeding together
Paper slipping during feeding
Incorrectly positioned tray guides
A custom document size
Dirty or worn feed rollers

HP’s current guidance distinguishes E1 as a paper-size mismatch and E2 as a paper-length mismatch on supported DeskJet models. HP DeskJet error-code guidance

How to fix HP error E2

Remove the paper.
Check that the sheets are flat and uniform.
Reload the correct size.
Adjust the paper guides.
Confirm the paper size in the application.
Confirm the size in the printer driver or HP Smart.
Print the document again.

HP Printer E3 Error: Carriage Jam

An E3 error commonly indicates that the cartridge carriage is obstructed or cannot move correctly.

The carriage is the moving assembly that holds the ink cartridges.

Possible causes include:

Jammed paper
Torn paper inside the printer
Packaging material left inside
An incorrectly installed cartridge
An open cartridge-access door
A foreign object in the carriage path
A mechanical carriage fault

How to fix HP error E3

Cancel the print job.
Switch off the printer.
Disconnect the power cable.
Open the cartridge-access area.
Use a torch to inspect the carriage path.
Remove accessible scraps of paper or debris.
Check that the cartridges are properly installed.
Close all access doors.
Reconnect the power.
Switch on the printer.

Do not force the carriage. If it is mechanically locked, forcing it may damage the belt, encoder strip or carriage assembly.

HP Printer E4 Error: Paper Jam

An E4 error normally means the printer has detected a paper jam.

The visible sheet may not be the only obstruction. Small scraps can remain:

Under the carriage
Inside the input tray
Near the output rollers
Behind a rear access panel
Inside the duplex unit
Inside the automatic document feeder

How to fix HP error E4

Switch off and unplug the printer.
Remove loose paper from the input and output trays.
Open the appropriate access areas.
Pull jammed paper slowly in the normal direction of travel.
Remove any torn pieces.
Check that the carriage path is clear.
Inspect the feed rollers.
Close every door securely.
Reload a small stack of suitable paper.
Restart the printer.

Do not use sharp tools to remove jammed paper.

If the printer continues reporting a jam when no paper is visible, a small scrap, dirty roller or damaged paper sensor may be responsible.

HP Printer E5 Error: Scanner Problem

An E5 error commonly indicates that the scanner is not functioning correctly.

The printer may still be able to print even if scanning is unavailable.

Possible causes include:

A temporary scanner control error
The scanner mechanism cannot initialise
The scanner carriage is obstructed
A cable or sensor fault
Internal hardware failure

How to fix HP error E5

Cancel the current scan.
Check whether any packing lock or material remains in place.
Restart the printer.
Try scanning from the control panel.
Test through HP Smart.
Check the scanner glass and lid.
Install current software for the exact model.

If the scanner makes repeated grinding noises or cannot initialise after restarting, the printer may require repair.

HP Printer E6 Error: General Error State

An E6 code commonly represents a general printer error that could not be shown as a more specific code.

How to fix HP error E6

Switch off the printer.
Disconnect the power cable.
Wait approximately 60 seconds.
Reconnect the cable.
Switch the printer on.
Wait until it becomes idle.
Try printing an internal test page.

HP’s user guidance for supported models recommends restarting after an E6 error and contacting support if it persists. HP printer support

If E6 returns immediately during start-up, record the model and all flashing-light patterns before arranging support.

HP Printer E9 Error

On selected HP home printers, E9 can relate to a firmware update or maintenance state. Its meaning is more model-dependent than E1–E6.

If E9 appears:

Do not unplug the printer while an update is visibly progressing.
Allow enough time for the process to complete.
Check HP Smart for further instructions.
Confirm that the internet connection is stable.
Restart only if the update has clearly stopped and the model’s instructions permit it.
Search HP Support using the exact printer model and E9.

Disconnecting power during an active firmware installation can prevent the printer from starting normally.

HP Ink Cartridge Error Messages

HP cartridge problems may appear as words rather than short codes.

Common messages include:

Cartridge Problem
Incompatible Cartridge
Missing or Damaged Cartridge
Cartridge Not Intended for This Printer
Remove and Reinstall Cartridge
Cartridges Blocked
Cartridge Failure
Cartridge Depleted
Used, Refilled or Counterfeit Cartridge Detected
Supply System Problem
Protected Cartridge
Indicated Cartridges Are Not Communicating Correctly

“Incompatible Cartridge” Message

This means the printer cannot accept or authenticate the installed cartridge.

Possible causes include:

Incorrect cartridge number
Cartridge intended for another printer family
Regional incompatibility
Damaged electronic circuitry
Cartridge not seated correctly
Cartridge protection
Firmware-related recognition
Instant Ink cartridge used outside an active subscription
Setup cartridge used incorrectly

What to check

Match the number to your exact printer model.
Check the UK or European cartridge version.
Remove all packaging and protective tape.
Reinstall the cartridge.
Inspect the contacts for damage.
Restart the printer.
Test another correct cartridge if available.

Two cartridges with a similar shape are not necessarily compatible. For UK models, consult our HP Ink Cartridge Compatibility Chart UK before ordering replacements.

“Missing or Damaged Cartridge” Message

This message appears when the printer cannot detect an installed cartridge reliably.

The cartridge may be:

Absent
Loose
Installed in the wrong slot
Electronically damaged
Physically damaged
Covered by protective material
Unable to communicate through dirty contacts

Remove and reinstall only the cartridge indicated by the printer. If the message moves to a different slot after cartridges are changed, follow model-specific instructions; do not install colours in incorrect positions merely as a test.

“Cartridge Problem” Message

A general Cartridge Problem message does not always mean the cartridge is empty.

It can indicate:

Incorrect installation
Failed contact
Incompatible product
Damaged cartridge
Regional mismatch
Printhead communication failure

Record whether the printer identifies a specific colour. That information helps separate a single-cartridge fault from a wider carriage or printhead problem.

“Protected Cartridge” Message

HP Cartridge Protection can associate a cartridge with a particular printer or group of printers.

A protected cartridge may be rejected when moved to another printer, even if the cartridge number would normally be compatible.

If you purchased a used printer or cartridge, confirm whether Cartridge Protection was previously enabled.

Do not confuse Cartridge Protection with:

Cartridge compatibility
Regionalisation
HP+
Instant Ink
Dynamic Security

These are related to cartridge use in different ways but are not the same feature.

“Cartridges Blocked” Message

A Cartridges Blocked message can relate to cartridge security, electronic recognition, printer configuration or firmware.

Before replacing the cartridge:

Confirm its number.
Check that it is designed for the UK printer model.
Restart the printer.
Inspect the contacts.
Review recent firmware changes.
Ask the cartridge supplier to confirm the chip version.

Do not install unofficial firmware intended for another model.

HP Instant Ink Cartridge Messages

Instant Ink cartridges are supplied as part of HP’s subscription service. They are linked to the enrolled printer and subscription status.

Messages may appear when:

The subscription has ended
Payment or account information needs attention
The printer has been disconnected from the internet
A subscription cartridge has been moved to another printer
The printer cannot contact the service
Retail and subscription cartridges have been mixed in an unsupported way

If an Instant Ink subscription has ended, install suitable retail cartridges to continue printing.

HP Ink System Failure and 0xc19a Error Codes

Messages such as the following normally indicate a wider ink-delivery or printhead problem:

Ink System Failure
System Supply Problem
Problem with Ink System
Print System Problem
Printer Failure
0xc19a0003
0xc19a0020
Other codes beginning with 0xc19a

The final digits may vary by printer and failure condition. Do not assume that every 0xc19a code identifies exactly the same failed component.

Possible causes include:

A leaking or damaged cartridge
An incorrectly installed cartridge
Air or ink-delivery problems
Printhead communication failure
A loose removable printhead
A damaged printhead
Internal ink-system failure
Firmware or control error

HP’s troubleshooting sequence for an Ink System Failure can include checking the cartridges, reseating a user-removable printhead, resetting the printer and arranging service if the fault remains. HP Ink System Failure guidance

How to troubleshoot an HP Ink System Failure

Record the complete alphanumeric code.
Check cartridges for leakage or physical damage.
Confirm that every cartridge is in the correct position.
Reinstall the cartridges.
Restart the printer.
Reseat the printhead only if HP describes it as user-removable.
Print a quality report if the printer becomes operational.
Contact HP or a repair technician if the error returns.

Never force out a fixed printhead or release a latch not intended for users.

HP Error 0x6100004a

Error 0x6100004a commonly appears on selected HP OfficeJet printers after a paper jam or when the carriage cannot move correctly.

It may involve:

Paper remaining inside the printer
A blocked carriage path
A cartridge-access door not properly closed
Incorrectly seated cartridges
A paper-feed obstruction
A mechanical carriage fault

HP’s official instructions for this error include ensuring the cartridge-access door is closed, clearing the error and arranging service if it cannot be resolved. HP 0x6100004a support guidance

What to do

Remove paper from the trays.
Inspect accessible paper paths.
Check beneath and around the carriage.
Remove visible scraps without dismantling the printer.
Make sure the cartridges are seated correctly.
Close every access door.
Restart the printer.

If the carriage is locked or makes grinding sounds, stop and arrange service.

“Printhead Problem” or “Missing or Failed Printhead”

This message means the printer cannot communicate with or correctly operate the printhead.

Potential causes include:

Printhead not installed correctly
Electrical contacts are dirty
Printhead latch is open
Incorrect replacement printhead
Printhead failure
Carriage electronics failure
Ink-system fault

What to do

Restart the printer.
Check the cartridges.
Reseat the printhead only if the manual describes it as removable.
Ensure any printhead latch is fully closed.
Install current HP software or firmware if the printer remains accessible.
Arrange repair if the message returns.

Repeated cleaning cycles will not repair an electronically failed printhead and may consume a significant amount of ink.

HP Paper and Tray Messages

“Paper Mismatch” or “Paper Size Mismatch”

This means the selected document size does not match the paper detected in the tray.

Check:

Document page size
Printer-driver paper size
Tray paper size
Paper orientation
Tray guides
A4 versus Letter selection

In the UK, an accidental Letter setting is a common cause when A4 paper is loaded.

“Out of Paper” When Paper Is Loaded

Possible causes include:

Too few or too many sheets
Paper guides are too loose or tight
Curled, damp or glossy paper
Dirty feed rollers
Incorrect paper type
Paper not pushed far enough into the tray
Worn pickup roller
Failed paper sensor

Remove the stack, square the edges and reload a modest quantity of supported paper.

“Load Tray 1” or “Load Tray 2”

This message may mean:

The requested tray is empty
The print job requires a different size
The tray is configured for another paper type
Manual feed was selected
The application is requesting Letter rather than A4

Check the full message. It may specify a size or type such as:

A4
Plain
Letter
Labels
Envelope
Heavy paper

HP LaserJet Error Codes

Numbered LaserJet service errors often refer to paper-path, firmware, memory, fuser, scanner, motor or internal communication problems.

Their precise interpretation varies by model.

HP LaserJet 13.xx Error: Paper Jam

A 13.xx code generally indicates a paper jam.

The digits after 13 can identify the approximate location or paper-path stage, such as:

Input tray
Registration area
Duplexer
Fuser
Output area
Automatic document feeder

What to do

Read the complete code and display message.
Remove the toner cartridge if instructed.
Check the indicated access door.
Remove paper slowly.
Look for torn scraps.
Check tray guides and paper quality.
Reinstall the toner cartridge.
Print a test page.

Laser printer fusers become extremely hot. Allow the printer to cool before touching areas carrying a heat warning.

HP LaserJet Error 20: Insufficient Memory

An error 20 commonly means the printer does not have enough available memory to process the job.

Try:

Cancelling the job
Printing fewer pages at once
Reducing image resolution
Flattening complex PDF files
Removing unnecessary fonts or graphics
Selecting a standard rather than high-resolution mode
Adding printer memory if the model supports it

A damaged or unusually complex document can trigger the error even when normal files print successfully.

HP LaserJet Error 21: Page Too Complex

A 21 error can indicate that the page is too complex for the printer to process at the selected resolution or speed.

Simplify the document, reduce the resolution or print the content in smaller sections.

HP LaserJet Error 22: Input/Output Configuration

Older LaserJet models may use error 22 for an I/O or connection problem.

Check:

USB or network cable
Print server
Network connection
Computer print queue
Driver
External accessories

The meaning is model-dependent, so consult the exact printer manual.

HP LaserJet Error 41.3: Unexpected Paper Size

Error 41.3 usually indicates that the printer detected a different paper size from the one expected.

Check:

Tray size setting
Paper guides
Document size
Driver setting
Multipurpose tray configuration
Paper-feed behaviour

A slipping sheet or multiple-sheet feed can cause the printer to measure an unexpected page length.

HP LaserJet Error 49: Firmware or Print-Job Error

An HP 49 error generally indicates a firmware communication problem. HP’s first recommended action is to power-cycle the printer and then check firmware if necessary. HP 49 error guidance

Common triggers include:

Corrupted print job
Problematic PDF or document
Driver incompatibility
Firmware issue
Network communication
Third-party accessory
Stored job
Formatter fault

How to isolate error 49

Cancel the print queue.
Disconnect the network or USB cable.
Restart the printer.
Check whether it reaches Ready while disconnected.
Delete the original failed job.
Reconnect the printer.
Print a simple internal page.
Try the document from another application.
Check the correct firmware and driver.

If the error appears only when one document is printed, the job is more likely to be responsible than the printer hardware.

HP LaserJet Error 50.x: Fuser Error

A 50.x error commonly relates to the fuser, which uses heat and pressure to bond toner to paper.

Possible causes include:

Fuser not reaching the required temperature
Excessive fuser temperature
Incorrect power supply
Fuser connection problem
Failed heating element
Internal power component
Incorrect replacement fuser

What to do

Switch the printer off.
Allow it to cool.
Check that the power cable is secure.
Connect it to a suitable outlet.
Restart once.
Arrange service if the error returns.

Do not touch the fuser immediately after printing.

HP LaserJet Error 51.x or 52.x

Codes beginning with 51 or 52 can relate to the laser/scanner assembly or beam-detection system on supported LaserJets.

Try a normal restart. If the code returns before any print job is sent, professional service may be required.

Do not confuse a LaserJet laser-scanner assembly error with a document scanner error on a multifunction inkjet.

HP LaserJet Error 54.x

A 54.x code can indicate a sensor, toner-supply, density or internal hardware problem, depending on the model.

Check:

Toner cartridge installation
Sealing strip removal
Transfer components
Printer doors
Recent maintenance
Model-specific HP instructions

Avoid purchasing parts until the complete code has been verified.

HP LaserJet Error 55.x

A 55.x error often indicates an internal communication or controller problem.

Possible actions include:

Restarting the printer
Disconnecting USB devices and optional accessories
Removing queued jobs
Checking firmware
Reseating authorised accessories
Arranging service

HP LaserJet Error 57.x: Fan Error

A 57.x code can indicate that an internal cooling fan is blocked or has failed.

Switch off the printer and check:

Ventilation openings
Dust buildup outside the machine
Nearby objects blocking airflow
Unusual fan noises

Do not open electrical covers or insert tools through the ventilation slots.

HP LaserJet Error 59.x: Motor Error

A 59.x error commonly relates to an internal motor or drive mechanism.

Possible causes include:

Incorrectly installed toner
Jammed transfer component
Obstructed paper path
Motor failure
Gear or drive problem
Packaging material left inside a new printer

Remove and reinstall user-replaceable supplies, inspect accessible paper paths and restart. Arrange service if the error returns.

HP LaserJet Error 79

Error 79 generally relates to firmware, a corrupted print job or communication with the printer.

How to troubleshoot error 79

Switch off the printer.
Disconnect the network and USB connections.
Cancel all queued print jobs from connected computers.
Restart the printer while disconnected.
Print an internal configuration page.
Reconnect one interface.
Send a simple test document.
Identify whether one file, driver or computer triggers the error.
Check firmware for the exact model.

If the printer displays error 79 while completely disconnected, the fault may require deeper firmware recovery or service.

HP Network and Connection Messages

“Printer Offline”

Printer Offline does not normally mean that the printer itself is switched off. It means the computer cannot communicate with it through the selected connection.

Check:

Printer power
Wi-Fi or Ethernet connection
USB cable
Computer and printer network
Default printer selection
Duplicate printer installations
Print queue status
Changed IP address
Driver
VPN or firewall
Router availability

If the printer can produce an internal test page, the printer engine is working and the problem is likely in the connection, queue or software.

“Attention Required”

Attention Required is a general Windows or printer-status message rather than a precise diagnosis.

Possible underlying causes include:

Paper jam
Empty tray
Open cover
Cartridge error
User confirmation required
Incorrect paper type
Paused queue
Authentication request
Failed print job

Open the queue, HP Smart or the printer’s control panel to find the underlying message.

“Driver Is Unavailable”

This message indicates that Windows cannot use the installed printer driver correctly.

Try:

Restarting the printer and computer
Removing duplicate installations
Running Windows Update
Installing the official software for the exact model
Removing and adding the printer again
Checking whether the printer supports the current operating system

Download drivers only from HP or the operating-system provider.

“Unable to Communicate with Printer”

Possible causes include:

Different Wi-Fi networks
Weak signal
Changed router password
Changed printer IP address
VPN interference
Firewall restriction
Printer in deep sleep
USB or Ethernet cable fault
Router isolation settings

Print a network report and compare the printer’s network name and IP address with the connected computer.

Scanner and ADF Messages

“Scanner Failure” or “Scanner System Failure”

A scanner error may involve:

Scanner carriage cannot initialise
Obstruction under the scanner glass
Internal cable or sensor failure
Temporary firmware issue
Software communication problem

Restart the printer and test a copy directly from the control panel. If copying also fails, the problem is more likely within the printer than the computer software.

“Document Feeder Jam”

Check:

ADF input tray
ADF cover
Pickup rollers
Output slot
Torn scraps of paper
Staples or paper clips
Folded or damaged originals

Use only clean, flat originals within the feeder’s supported size and thickness.

Safe HP Printer Power Restart

A proper power restart can clear temporary control, communication and sensor errors.

Wait until the printer stops attempting to move.
Switch it off normally if possible.
Disconnect the power cable.
Wait approximately 60 seconds.
Reconnect the cable.
Switch on the printer.
Wait until it becomes idle.
Test an internal report before printing from the computer.

A restart will not repair damaged hardware, make an incompatible cartridge compatible or remove a physical obstruction.

Should You Perform a Factory Reset?

A factory reset is different from a power restart. It may erase:

Wi-Fi details
Preferences
Address-book entries
Web-service settings
Custom tray settings
Stored credentials
Fax settings

Use a factory reset only when the model-specific instructions recommend it and you are prepared to configure the printer again.

When to Stop Troubleshooting

Disconnect the printer and arrange qualified support if:

You smell burning or see smoke
Liquid has entered the printer
The power cable is damaged
The printer repeatedly trips the electrical supply
The carriage makes severe grinding noises
A fuser or internal component appears damaged
The printer cannot complete start-up
A hardware error returns while disconnected from all computers
The printhead or carriage is physically damaged
The printer was dropped
The recommended user-level steps do not clear the fault

Do not open electrical, high-voltage or laser assemblies.

Frequently Asked Questions

How do I find the meaning of an HP printer error code?

Record the full code and search HP Support using the exact printer model. Short codes can have different meanings across HP DeskJet, ENVY, OfficeJet and LaserJet printers.

What does E0 mean on an HP printer?

On many HP DeskJet printers, E0 indicates a cartridge problem. Confirm the cartridge number, remove protective material and reinstall the indicated cartridge.

What does E1 mean on an HP printer?

E1 usually indicates that the paper width or selected paper size does not match the print job.

What does E2 mean on an HP printer?

E2 commonly indicates a paper-length mismatch. Check the loaded paper, tray guides and document size.

What does E3 mean on an HP printer?

E3 usually points to a carriage jam or obstruction on supported HP DeskJet printers. Inspect the accessible carriage path for jammed paper or debris.

What does E4 mean on an HP printer?

E4 usually means the printer has detected a paper jam. Check the input tray, cartridge-access area, rear paper path, duplexer and output area.

What does E5 mean on an HP printer?

E5 commonly indicates a scanner failure. Restart the printer and test scanning or copying again.

What does E6 mean on an HP printer?

E6 generally means the printer is in an unspecified error state. Perform a power restart and check HP Support if the code returns.

Why does my HP printer show an error when there is no paper jam?

A small piece of paper, dirty roller, obstructed carriage or damaged paper sensor can produce a jam message even when no full sheet is visible.

What does Ink System Failure mean?

It indicates that the printer has detected a problem involving its cartridges, ink delivery or printhead. Check for damaged cartridges, reinstall them and follow the model-specific printhead guidance.

What does HP error 0x6100004a mean?

On supported OfficeJet models, it commonly relates to the paper path, carriage movement or a mechanical obstruction, sometimes following a paper jam.

What does error 49 mean on an HP LaserJet?

Error 49 generally indicates a firmware communication problem or invalid print job. Clear the queue, disconnect the printer, restart it and identify whether a particular file triggers the error.

What does error 50 mean on an HP LaserJet?

A 50-series error normally relates to the fuser or its power and temperature control. Restart once and arrange service if it returns.

What does error 79 mean on an HP printer?

Error 79 is commonly associated with firmware or a problematic print job. Disconnect network and USB cables, restart the printer and clear the print queue.

Can incompatible cartridges cause an HP error code?

Yes. Incorrect cartridge numbers, regional incompatibility, damaged electronic contacts or unsupported cartridges can produce E0, Incompatible Cartridge, Cartridge Problem and similar messages.

Will resetting an HP printer remove an error code?

A power restart may clear a temporary error. It will not fix a paper obstruction, damaged cartridge, failed printhead, bad fuser or other physical problem.

Can firmware cause HP cartridge errors?

Firmware can change cartridge-recognition behaviour on some printers. However, incorrect cartridges, damaged chips, dirty contacts and regional mismatches can produce similar messages.

Should I update the firmware when an error appears?

Only update firmware intended for the exact printer model, and do not interrupt the installation. First establish whether the code concerns firmware, hardware, paper or cartridges.

How do I clear an HP printer error state in Windows?

Resolve the physical printer message first. Then clear failed jobs, restart the Print Spooler, confirm the correct printer is selected and test the connection.

When does an HP printer need professional repair?

Professional help may be necessary when a hardware or service error returns during start-up, the carriage is mechanically locked, the printer has electrical symptoms, or a fuser, motor, scanner assembly or printhead has failed.

Final HP Error-Code Checklist

Before arranging a repair, confirm that you have:

Recorded the full code and message
Identified the exact printer model
Checked the display and warning lights
Removed visible paper jams
Inspected the carriage path
Checked paper-size settings
Confirmed cartridge compatibility
Reinstalled cartridges correctly
Tested an internal report
Cleared the print queue
Checked USB, Ethernet or Wi-Fi
Performed a safe power restart
Checked the official support page
Reviewed warranty or repair options

The error code should be treated as the beginning of the diagnosis, not a universal answer. Use it together with the complete model, warning lights and symptoms to identify the correct solution.

An HP printer error code can point to something simple, such as the wrong paper size, or a more serious problem involving the carriage, printhead, firmware or internal hardware.

This guide explains common HP printer error codes and messages, including:

HP DeskJet E0–E9 errors
Ink cartridge and printhead messages
Ink System Failure and 0x codes
Paper jam and carriage errors
HP LaserJet service codes
Wi-Fi, offline and connection messages
Scanner and automatic document feeder errors
Safe troubleshooting steps
When a printer may require professional repair

Important: HP error codes are model-specific. Always record the full code and check it against the support page for your exact printer model before replacing parts or changing firmware.

HP Printer Error Codes: Quick Lookup Chart

Use this table as a starting point. More detailed explanations appear below.

Error code or message	Common meaning	First action
E0	Cartridge problem	Check, remove and reinstall the indicated cartridge
E1	Paper-size mismatch	Match the loaded paper to the print setting
E2	Paper-length or paper-size mismatch	Check the document and tray paper settings
E3	Carriage jam or obstruction	Inspect the cartridge carriage path
E4	Paper jam	Clear paper from every accessible paper path
E5	Scanner error	Restart and test the scanner again
E6	General printer error state	Perform a power restart
E9	Firmware or update-related state on selected models	Allow the update to finish or follow model-specific guidance
Cartridge Problem	Cartridge cannot be read or used	Check the number, contacts and installation
Incompatible Cartridge	Wrong cartridge or regional mismatch	Confirm the cartridge family and printer region
Missing or Damaged Cartridge	Cartridge is absent or not communicating	Reinstall or test a replacement
Ink System Failure	Ink delivery, printhead or cartridge problem	Inspect cartridges and restart the printer
Printhead Problem	Printhead cannot operate or communicate	Reseat it if user-removable; otherwise seek support
0x6100004a	Paper-path, carriage or mechanical problem	Check for jams and carriage obstructions
0xc19a…	Ink-system or printhead fault	Inspect cartridges and printhead, then restart
13.xx	Paper jam on many LaserJets	Find and remove paper from the indicated location
20	Insufficient printer memory	Simplify the job or add memory where supported
41.3	Unexpected paper size	Check tray guides and paper settings
49	Firmware or print-job communication error	Cancel the job and restart the printer
50.x	Fuser fault on many LaserJets	Restart once; arrange service if it returns
51.x	Laser or beam-detection error	Restart and seek service if persistent
52.x	Scanner or laser-scanner assembly error	Restart and check model-specific support
54.x	Sensor or toner-related hardware error	Check supplies and arrange service if needed
55.x	Internal communication error	Restart and disconnect accessories
57.x	Fan error	Switch off and check ventilation
59.x	Motor or drive error	Restart; inspect consumables and paper path
79	Firmware or invalid print-job error	Disconnect network/USB, restart and isolate the job
Printer Offline	Computer cannot communicate with printer	Check connection, queue and selected printer
Attention Required	Printer needs user action	Read the display or HP app for the underlying fault

Before Troubleshooting an HP Error Code

Before changing settings or buying replacement parts, record:

The complete error code
Every word in the message
Which warning lights are flashing
The printer’s full model number
What happened immediately before the error
Whether cartridges, toner or paper were recently changed
Whether firmware or software was recently updated
Whether the error appears during start-up or only when printing
Whether the printer can produce an internal test page

A photograph of the display can be useful if the error disappears after restarting.

HP DeskJet E0–E9 Error Codes

Short codes such as E0, E1 and E4 are common on HP DeskJet and similar home printers with small segment displays.

The exact interpretation can vary, so use the following explanations as a guide rather than assuming they apply universally.

HP Printer E0 Error: Cartridge Problem

An E0 error commonly indicates a problem with one or both ink cartridges.

Possible causes include:

The cartridge is not installed correctly
The cartridge number is incompatible
Protective tape remains attached
The electrical contacts are dirty
The cartridge is damaged
The printer cannot communicate with the cartridge
The cartridge is intended for another region
A previously used cartridge has failed
Firmware cannot recognise the cartridge

How to fix HP error E0

Open the cartridge-access door.
Wait until the carriage stops moving.
Identify the cartridge indicated by the flashing Ink Level icon.
Remove that cartridge.
Confirm that its number matches the printer.
Remove any remaining protective tape.
Inspect the copper-coloured electrical contacts.
Reinstall the cartridge firmly.
Close the access door.
Wait for the printer to complete its check.

If the error remains, test another suitable cartridge if one is available.

Avoid touching the ink nozzles or copper contacts with your fingers. Oils and dirt can interfere with communication.

For help finding the correct cartridge, use our HP Ink Cartridge Compatibility Chart UK.

HP Printer E1 Error: Paper-Size Mismatch

An E1 error commonly means that the paper width detected by the printer does not match the size selected in the software.

For example, the printer may contain A4 paper while the document or driver is configured for Letter paper.

How to fix HP error E1

Check the paper loaded in the input tray.
Move the paper-width guides against the paper without bending it.
Open the print dialogue on the computer or mobile device.
Select the correct paper size.
Confirm the same size in HP Smart or the printer settings.
Cancel the failed job and print it again.

For UK printing, check carefully whether the document is set to:

A4
A5
10 × 15 cm
Letter
Legal
Another custom size

A4 and US Letter are not identical.

HP Printer E2 Error: Paper-Length Mismatch

An E2 error usually means the paper length detected during printing does not agree with the print-job setting.

This can be caused by:

Incorrect paper-size selection
Paper loaded in the wrong orientation
Multiple sheets feeding together
Paper slipping during feeding
Incorrectly positioned tray guides
A custom document size
Dirty or worn feed rollers

HP’s current guidance distinguishes E1 as a paper-size mismatch and E2 as a paper-length mismatch on supported DeskJet models. HP DeskJet error-code guidance

How to fix HP error E2

Remove the paper.
Check that the sheets are flat and uniform.
Reload the correct size.
Adjust the paper guides.
Confirm the paper size in the application.
Confirm the size in the printer driver or HP Smart.
Print the document again.

HP Printer E3 Error: Carriage Jam

An E3 error commonly indicates that the cartridge carriage is obstructed or cannot move correctly.

The carriage is the moving assembly that holds the ink cartridges.

Possible causes include:

Jammed paper
Torn paper inside the printer
Packaging material left inside
An incorrectly installed cartridge
An open cartridge-access door
A foreign object in the carriage path
A mechanical carriage fault

How to fix HP error E3

Cancel the print job.
Switch off the printer.
Disconnect the power cable.
Open the cartridge-access area.
Use a torch to inspect the carriage path.
Remove accessible scraps of paper or debris.
Check that the cartridges are properly installed.
Close all access doors.
Reconnect the power.
Switch on the printer.

Do not force the carriage. If it is mechanically locked, forcing it may damage the belt, encoder strip or carriage assembly.

HP Printer E4 Error: Paper Jam

An E4 error normally means the printer has detected a paper jam.

The visible sheet may not be the only obstruction. Small scraps can remain:

Under the carriage
Inside the input tray
Near the output rollers
Behind a rear access panel
Inside the duplex unit
Inside the automatic document feeder

How to fix HP error E4

Switch off and unplug the printer.
Remove loose paper from the input and output trays.
Open the appropriate access areas.
Pull jammed paper slowly in the normal direction of travel.
Remove any torn pieces.
Check that the carriage path is clear.
Inspect the feed rollers.
Close every door securely.
Reload a small stack of suitable paper.
Restart the printer.

Do not use sharp tools to remove jammed paper.

If the printer continues reporting a jam when no paper is visible, a small scrap, dirty roller or damaged paper sensor may be responsible.

HP Printer E5 Error: Scanner Problem

An E5 error commonly indicates that the scanner is not functioning correctly.

The printer may still be able to print even if scanning is unavailable.

Possible causes include:

A temporary scanner control error
The scanner mechanism cannot initialise
The scanner carriage is obstructed
A cable or sensor fault
Internal hardware failure

How to fix HP error E5

Cancel the current scan.
Check whether any packing lock or material remains in place.
Restart the printer.
Try scanning from the control panel.
Test through HP Smart.
Check the scanner glass and lid.
Install current software for the exact model.

If the scanner makes repeated grinding noises or cannot initialise after restarting, the printer may require repair.

HP Printer E6 Error: General Error State

An E6 code commonly represents a general printer error that could not be shown as a more specific code.

How to fix HP error E6

Switch off the printer.
Disconnect the power cable.
Wait approximately 60 seconds.
Reconnect the cable.
Switch the printer on.
Wait until it becomes idle.
Try printing an internal test page.

HP’s user guidance for supported models recommends restarting after an E6 error and contacting support if it persists. HP printer support

If E6 returns immediately during start-up, record the model and all flashing-light patterns before arranging support.

HP Printer E9 Error

On selected HP home printers, E9 can relate to a firmware update or maintenance state. Its meaning is more model-dependent than E1–E6.

If E9 appears:

Do not unplug the printer while an update is visibly progressing.
Allow enough time for the process to complete.
Check HP Smart for further instructions.
Confirm that the internet connection is stable.
Restart only if the update has clearly stopped and the model’s instructions permit it.
Search HP Support using the exact printer model and E9.

Disconnecting power during an active firmware installation can prevent the printer from starting normally.

HP Ink Cartridge Error Messages

HP cartridge problems may appear as words rather than short codes.

Common messages include:

Cartridge Problem
Incompatible Cartridge
Missing or Damaged Cartridge
Cartridge Not Intended for This Printer
Remove and Reinstall Cartridge
Cartridges Blocked
Cartridge Failure
Cartridge Depleted
Used, Refilled or Counterfeit Cartridge Detected
Supply System Problem
Protected Cartridge
Indicated Cartridges Are Not Communicating Correctly

“Incompatible Cartridge” Message

This means the printer cannot accept or authenticate the installed cartridge.

Possible causes include:

Incorrect cartridge number
Cartridge intended for another printer family
Regional incompatibility
Damaged electronic circuitry
Cartridge not seated correctly
Cartridge protection
Firmware-related recognition
Instant Ink cartridge used outside an active subscription
Setup cartridge used incorrectly

What to check

Match the number to your exact printer model.
Check the UK or European cartridge version.
Remove all packaging and protective tape.
Reinstall the cartridge.
Inspect the contacts for damage.
Restart the printer.
Test another correct cartridge if available.

Two cartridges with a similar shape are not necessarily compatible. For UK models, consult our HP Ink Cartridge Compatibility Chart UK before ordering replacements.

“Missing or Damaged Cartridge” Message

This message appears when the printer cannot detect an installed cartridge reliably.

The cartridge may be:

Absent
Loose
Installed in the wrong slot
Electronically damaged
Physically damaged
Covered by protective material
Unable to communicate through dirty contacts

“Cartridge Problem” Message

A general Cartridge Problem message does not always mean the cartridge is empty.

It can indicate:

Incorrect installation
Failed contact
Incompatible product
Damaged cartridge
Regional mismatch
Printhead communication failure

Record whether the printer identifies a specific colour. That information helps separate a single-cartridge fault from a wider carriage or printhead problem.

“Protected Cartridge” Message

HP Cartridge Protection can associate a cartridge with a particular printer or group of printers.

A protected cartridge may be rejected when moved to another printer, even if the cartridge number would normally be compatible.

If you purchased a used printer or cartridge, confirm whether Cartridge Protection was previously enabled.

Do not confuse Cartridge Protection with:

Cartridge compatibility
Regionalisation
HP+
Instant Ink
Dynamic Security

These are related to cartridge use in different ways but are not the same feature.

“Cartridges Blocked” Message

A Cartridges Blocked message can relate to cartridge security, electronic recognition, printer configuration or firmware.

Before replacing the cartridge:

Confirm its number.
Check that it is designed for the UK printer model.
Restart the printer.
Inspect the contacts.
Review recent firmware changes.
Ask the cartridge supplier to confirm the chip version.

Do not install unofficial firmware intended for another model.

HP Instant Ink Cartridge Messages

Instant Ink cartridges are supplied as part of HP’s subscription service. They are linked to the enrolled printer and subscription status.

Messages may appear when:

The subscription has ended
Payment or account information needs attention
The printer has been disconnected from the internet
A subscription cartridge has been moved to another printer
The printer cannot contact the service
Retail and subscription cartridges have been mixed in an unsupported way

If an Instant Ink subscription has ended, install suitable retail cartridges to continue printing.

HP Ink System Failure and 0xc19a Error Codes

Messages such as the following normally indicate a wider ink-delivery or printhead problem:

Ink System Failure
System Supply Problem
Problem with Ink System
Print System Problem
Printer Failure
0xc19a0003
0xc19a0020
Other codes beginning with 0xc19a

The final digits may vary by printer and failure condition. Do not assume that every 0xc19a code identifies exactly the same failed component.

Possible causes include:

A leaking or damaged cartridge
An incorrectly installed cartridge
Air or ink-delivery problems
Printhead communication failure
A loose removable printhead
A damaged printhead
Internal ink-system failure
Firmware or control error

How to troubleshoot an HP Ink System Failure

Record the complete alphanumeric code.
Check cartridges for leakage or physical damage.
Confirm that every cartridge is in the correct position.
Reinstall the cartridges.
Restart the printer.
Reseat the printhead only if HP describes it as user-removable.
Print a quality report if the printer becomes operational.
Contact HP or a repair technician if the error returns.

Never force out a fixed printhead or release a latch not intended for users.

HP Error 0x6100004a

Error 0x6100004a commonly appears on selected HP OfficeJet printers after a paper jam or when the carriage cannot move correctly.

It may involve:

Paper remaining inside the printer
A blocked carriage path
A cartridge-access door not properly closed
Incorrectly seated cartridges
A paper-feed obstruction
A mechanical carriage fault

HP’s official instructions for this error include ensuring the cartridge-access door is closed, clearing the error and arranging service if it cannot be resolved. HP 0x6100004a support guidance

What to do

Remove paper from the trays.
Inspect accessible paper paths.
Check beneath and around the carriage.
Remove visible scraps without dismantling the printer.
Make sure the cartridges are seated correctly.
Close every access door.
Restart the printer.

If the carriage is locked or makes grinding sounds, stop and arrange service.

“Printhead Problem” or “Missing or Failed Printhead”

This message means the printer cannot communicate with or correctly operate the printhead.

Potential causes include:

Printhead not installed correctly
Electrical contacts are dirty
Printhead latch is open
Incorrect replacement printhead
Printhead failure
Carriage electronics failure
Ink-system fault

What to do

Restart the printer.
Check the cartridges.
Reseat the printhead only if the manual describes it as removable.
Ensure any printhead latch is fully closed.
Install current HP software or firmware if the printer remains accessible.
Arrange repair if the message returns.

Repeated cleaning cycles will not repair an electronically failed printhead and may consume a significant amount of ink.

HP Paper and Tray Messages

“Paper Mismatch” or “Paper Size Mismatch”

This means the selected document size does not match the paper detected in the tray.

Check:

Document page size
Printer-driver paper size
Tray paper size
Paper orientation
Tray guides
A4 versus Letter selection

In the UK, an accidental Letter setting is a common cause when A4 paper is loaded.

“Out of Paper” When Paper Is Loaded

Possible causes include:

Too few or too many sheets
Paper guides are too loose or tight
Curled, damp or glossy paper
Dirty feed rollers
Incorrect paper type
Paper not pushed far enough into the tray
Worn pickup roller
Failed paper sensor

Remove the stack, square the edges and reload a modest quantity of supported paper.

“Load Tray 1” or “Load Tray 2”

This message may mean:

The requested tray is empty
The print job requires a different size
The tray is configured for another paper type
Manual feed was selected
The application is requesting Letter rather than A4

Check the full message. It may specify a size or type such as:

A4
Plain
Letter
Labels
Envelope
Heavy paper

HP LaserJet Error Codes

Numbered LaserJet service errors often refer to paper-path, firmware, memory, fuser, scanner, motor or internal communication problems.

Their precise interpretation varies by model.

HP LaserJet 13.xx Error: Paper Jam

A 13.xx code generally indicates a paper jam.

The digits after 13 can identify the approximate location or paper-path stage, such as:

Input tray
Registration area
Duplexer
Fuser
Output area
Automatic document feeder

What to do

Read the complete code and display message.
Remove the toner cartridge if instructed.
Check the indicated access door.
Remove paper slowly.
Look for torn scraps.
Check tray guides and paper quality.
Reinstall the toner cartridge.
Print a test page.

Laser printer fusers become extremely hot. Allow the printer to cool before touching areas carrying a heat warning.

HP LaserJet Error 20: Insufficient Memory

An error 20 commonly means the printer does not have enough available memory to process the job.

Try:

Cancelling the job
Printing fewer pages at once
Reducing image resolution
Flattening complex PDF files
Removing unnecessary fonts or graphics
Selecting a standard rather than high-resolution mode
Adding printer memory if the model supports it

A damaged or unusually complex document can trigger the error even when normal files print successfully.

HP LaserJet Error 21: Page Too Complex

A 21 error can indicate that the page is too complex for the printer to process at the selected resolution or speed.

Simplify the document, reduce the resolution or print the content in smaller sections.

HP LaserJet Error 22: Input/Output Configuration

Older LaserJet models may use error 22 for an I/O or connection problem.

Check:

USB or network cable
Print server
Network connection
Computer print queue
Driver
External accessories

The meaning is model-dependent, so consult the exact printer manual.

HP LaserJet Error 41.3: Unexpected Paper Size

Error 41.3 usually indicates that the printer detected a different paper size from the one expected.

Check:

Tray size setting
Paper guides
Document size
Driver setting
Multipurpose tray configuration
Paper-feed behaviour

A slipping sheet or multiple-sheet feed can cause the printer to measure an unexpected page length.

HP LaserJet Error 49: Firmware or Print-Job Error

An HP 49 error generally indicates a firmware communication problem. HP’s first recommended action is to power-cycle the printer and then check firmware if necessary. HP 49 error guidance

Common triggers include:

Corrupted print job
Problematic PDF or document
Driver incompatibility
Firmware issue
Network communication
Third-party accessory
Stored job
Formatter fault

How to isolate error 49

Cancel the print queue.
Disconnect the network or USB cable.
Restart the printer.
Check whether it reaches Ready while disconnected.
Delete the original failed job.
Reconnect the printer.
Print a simple internal page.
Try the document from another application.
Check the correct firmware and driver.

If the error appears only when one document is printed, the job is more likely to be responsible than the printer hardware.

HP LaserJet Error 50.x: Fuser Error

A 50.x error commonly relates to the fuser, which uses heat and pressure to bond toner to paper.

Possible causes include:

Fuser not reaching the required temperature
Excessive fuser temperature
Incorrect power supply
Fuser connection problem
Failed heating element
Internal power component
Incorrect replacement fuser

What to do

Switch the printer off.
Allow it to cool.
Check that the power cable is secure.
Connect it to a suitable outlet.
Restart once.
Arrange service if the error returns.

Do not touch the fuser immediately after printing.

HP LaserJet Error 51.x or 52.x

Codes beginning with 51 or 52 can relate to the laser/scanner assembly or beam-detection system on supported LaserJets.

Try a normal restart. If the code returns before any print job is sent, professional service may be required.

Do not confuse a LaserJet laser-scanner assembly error with a document scanner error on a multifunction inkjet.

HP LaserJet Error 54.x

A 54.x code can indicate a sensor, toner-supply, density or internal hardware problem, depending on the model.

Check:

Toner cartridge installation
Sealing strip removal
Transfer components
Printer doors
Recent maintenance
Model-specific HP instructions

Avoid purchasing parts until the complete code has been verified.

HP LaserJet Error 55.x

A 55.x error often indicates an internal communication or controller problem.

Possible actions include:

Restarting the printer
Disconnecting USB devices and optional accessories
Removing queued jobs
Checking firmware
Reseating authorised accessories
Arranging service

HP LaserJet Error 57.x: Fan Error

A 57.x code can indicate that an internal cooling fan is blocked or has failed.

Switch off the printer and check:

Ventilation openings
Dust buildup outside the machine
Nearby objects blocking airflow
Unusual fan noises

Do not open electrical covers or insert tools through the ventilation slots.

HP LaserJet Error 59.x: Motor Error

A 59.x error commonly relates to an internal motor or drive mechanism.

Possible causes include:

Incorrectly installed toner
Jammed transfer component
Obstructed paper path
Motor failure
Gear or drive problem
Packaging material left inside a new printer

Remove and reinstall user-replaceable supplies, inspect accessible paper paths and restart. Arrange service if the error returns.

HP LaserJet Error 79

Error 79 generally relates to firmware, a corrupted print job or communication with the printer.

How to troubleshoot error 79

Switch off the printer.
Disconnect the network and USB connections.
Cancel all queued print jobs from connected computers.
Restart the printer while disconnected.
Print an internal configuration page.
Reconnect one interface.
Send a simple test document.
Identify whether one file, driver or computer triggers the error.
Check firmware for the exact model.

If the printer displays error 79 while completely disconnected, the fault may require deeper firmware recovery or service.

HP Network and Connection Messages

“Printer Offline”

Printer Offline does not normally mean that the printer itself is switched off. It means the computer cannot communicate with it through the selected connection.

Check:

Printer power
Wi-Fi or Ethernet connection
USB cable
Computer and printer network
Default printer selection
Duplicate printer installations
Print queue status
Changed IP address
Driver
VPN or firewall
Router availability

If the printer can produce an internal test page, the printer engine is working and the problem is likely in the connection, queue or software.

“Attention Required”

Attention Required is a general Windows or printer-status message rather than a precise diagnosis.

Possible underlying causes include:

Paper jam
Empty tray
Open cover
Cartridge error
User confirmation required
Incorrect paper type
Paused queue
Authentication request
Failed print job

Open the queue, HP Smart or the printer’s control panel to find the underlying message.

“Driver Is Unavailable”

This message indicates that Windows cannot use the installed printer driver correctly.

Try:

Restarting the printer and computer
Removing duplicate installations
Running Windows Update
Installing the official software for the exact model
Removing and adding the printer again
Checking whether the printer supports the current operating system

Download drivers only from HP or the operating-system provider.

“Unable to Communicate with Printer”

Possible causes include:

Different Wi-Fi networks
Weak signal
Changed router password
Changed printer IP address
VPN interference
Firewall restriction
Printer in deep sleep
USB or Ethernet cable fault
Router isolation settings

Print a network report and compare the printer’s network name and IP address with the connected computer.

Scanner and ADF Messages

“Scanner Failure” or “Scanner System Failure”

A scanner error may involve:

Scanner carriage cannot initialise
Obstruction under the scanner glass
Internal cable or sensor failure
Temporary firmware issue
Software communication problem

Restart the printer and test a copy directly from the control panel. If copying also fails, the problem is more likely within the printer than the computer software.

“Document Feeder Jam”

Check:

ADF input tray
ADF cover
Pickup rollers
Output slot
Torn scraps of paper
Staples or paper clips
Folded or damaged originals

Use only clean, flat originals within the feeder’s supported size and thickness.

Safe HP Printer Power Restart

A proper power restart can clear temporary control, communication and sensor errors.

Wait until the printer stops attempting to move.
Switch it off normally if possible.
Disconnect the power cable.
Wait approximately 60 seconds.
Reconnect the cable.
Switch on the printer.
Wait until it becomes idle.
Test an internal report before printing from the computer.

A restart will not repair damaged hardware, make an incompatible cartridge compatible or remove a physical obstruction.

Should You Perform a Factory Reset?

A factory reset is different from a power restart. It may erase:

Wi-Fi details
Preferences
Address-book entries
Web-service settings
Custom tray settings
Stored credentials
Fax settings

Use a factory reset only when the model-specific instructions recommend it and you are prepared to configure the printer again.

When to Stop Troubleshooting

Disconnect the printer and arrange qualified support if:

You smell burning or see smoke
Liquid has entered the printer
The power cable is damaged
The printer repeatedly trips the electrical supply
The carriage makes severe grinding noises
A fuser or internal component appears damaged
The printer cannot complete start-up
A hardware error returns while disconnected from all computers
The printhead or carriage is physically damaged
The printer was dropped
The recommended user-level steps do not clear the fault

Do not open electrical, high-voltage or laser assemblies.

Frequently Asked Questions

How do I find the meaning of an HP printer error code?

Record the full code and search HP Support using the exact printer model. Short codes can have different meanings across HP DeskJet, ENVY, OfficeJet and LaserJet printers.

What does E0 mean on an HP printer?

On many HP DeskJet printers, E0 indicates a cartridge problem. Confirm the cartridge number, remove protective material and reinstall the indicated cartridge.

What does E1 mean on an HP printer?

E1 usually indicates that the paper width or selected paper size does not match the print job.

What does E2 mean on an HP printer?

E2 commonly indicates a paper-length mismatch. Check the loaded paper, tray guides and document size.

What does E3 mean on an HP printer?

E3 usually points to a carriage jam or obstruction on supported HP DeskJet printers. Inspect the accessible carriage path for jammed paper or debris.

What does E4 mean on an HP printer?

E4 usually means the printer has detected a paper jam. Check the input tray, cartridge-access area, rear paper path, duplexer and output area.

What does E5 mean on an HP printer?

E5 commonly indicates a scanner failure. Restart the printer and test scanning or copying again.

What does E6 mean on an HP printer?

E6 generally means the printer is in an unspecified error state. Perform a power restart and check HP Support if the code returns.

Why does my HP printer show an error when there is no paper jam?

A small piece of paper, dirty roller, obstructed carriage or damaged paper sensor can produce a jam message even when no full sheet is visible.

What does Ink System Failure mean?

What does HP error 0x6100004a mean?

On supported OfficeJet models, it commonly relates to the paper path, carriage movement or a mechanical obstruction, sometimes following a paper jam.

What does error 49 mean on an HP LaserJet?

Error 49 generally indicates a firmware communication problem or invalid print job. Clear the queue, disconnect the printer, restart it and identify whether a particular file triggers the error.

What does error 50 mean on an HP LaserJet?

A 50-series error normally relates to the fuser or its power and temperature control. Restart once and arrange service if it returns.

What does error 79 mean on an HP printer?

Error 79 is commonly associated with firmware or a problematic print job. Disconnect network and USB cables, restart the printer and clear the print queue.

Can incompatible cartridges cause an HP error code?

Yes. Incorrect cartridge numbers, regional incompatibility, damaged electronic contacts or unsupported cartridges can produce E0, Incompatible Cartridge, Cartridge Problem and similar messages.

Will resetting an HP printer remove an error code?

A power restart may clear a temporary error. It will not fix a paper obstruction, damaged cartridge, failed printhead, bad fuser or other physical problem.

Can firmware cause HP cartridge errors?

Firmware can change cartridge-recognition behaviour on some printers. However, incorrect cartridges, damaged chips, dirty contacts and regional mismatches can produce similar messages.

Should I update the firmware when an error appears?

Only update firmware intended for the exact printer model, and do not interrupt the installation. First establish whether the code concerns firmware, hardware, paper or cartridges.

How do I clear an HP printer error state in Windows?

Resolve the physical printer message first. Then clear failed jobs, restart the Print Spooler, confirm the correct printer is selected and test the connection.

When does an HP printer need professional repair?

Final HP Error-Code Checklist

Before arranging a repair, confirm that you have:

Recorded the full code and message
Identified the exact printer model
Checked the display and warning lights
Removed visible paper jams
Inspected the carriage path
Checked paper-size settings
Confirmed cartridge compatibility
Reinstalled cartridges correctly
Tested an internal report
Cleared the print queue
Checked USB, Ethernet or Wi-Fi
Performed a safe power restart
Checked the official support page
Reviewed warranty or repair options

The error code should be treated as the beginning of the diagnosis, not a universal answer. Use it together with the complete model, warning lights and symptoms to identify the correct solution.