E04PIXMA E477

Canon PIXMA E477 Error E04: Troubleshooting Guide

The Canon PIXMA E477 error E04 indicates that the printer system is failing to recognize one of the installed ink cartridges. This fault typically occurs due to a communication breakdown between the cartridge's internal chip and the printer carriage pins. Often, knowing why is my Canon PIXMA E477 showing error E04 involves checking the contact points, which is a straightforward fix for this compact home printer.

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Common causes

  • 1Dirty or oxidized electrical contacts on the cartridge.
  • 2Misalignment causing poor contact with the printer carriage.
  • 3Faulty cartridge chip due to hardware failure.
  • 4Accumulated ink residue on the printer's contact pins.

Solutions

Quick Diagnosis

The E04 error is confirmed by a flashing orange alarm light on the printer panel. If you open the cover and notice the cartridges are loose, this confirms the communication fault.

Step-by-Step Solution

  1. Power off the printer and unplug it from the power source.
  2. Open the front door to access the cartridge carriage.
  3. Remove both cartridges carefully without touching the metallic chips.
  4. Clean the contacts using a lint-free cloth lightly dampened with isopropyl alcohol.
  5. Reinsert the cartridges and ensure they lock firmly in place.

Prevention and Maintenance

Always avoid touching the gold contact chips with your bare fingers to prevent oil residue buildup. Use genuine ink cartridges for the best electrical compatibility and keep the printer in a dust-free environment.

When to Call a Technician

If the error persists after cleaning and seating the cartridges, there may be a physical defect in the carriage ribbon cable, requiring professional repair.

Technical Specifications

  • Technology: FINE Inkjet
  • Speed: Up to 8 ipm black
  • Connectivity: Wi-Fi and USB
  • Compatible Consumable: PG-47 (black) and CL-57 (color) series
  • Recommended Use: Home / Small Office
  • Official drivers / firmware

Steps to follow

  1. 1

    Open the access door

    Lift the front cover to reach the ink cartridges.

  2. 2

    Remove cartridges

    Take out the cartridges and wipe the gold contacts with a dry cloth.

  3. 3

    Reinstall

    Insert them back until you hear a click.

Frequently asked questions

Error E04 means the printer cannot detect one or both ink cartridges, often due to dirty contact points.

It is not critical; it is a common communication error that is usually fixed with a simple cleaning.

This printer uses the Canon PG-47 and CL-57 ink series.

Clean the contacts whenever you install new cartridges to ensure optimal connectivity.