54.3LaserJet Pro M28w

Error 54.3 HP LaserJet Pro M28w: Critical Fix

The HP LaserJet Pro M28w error 54.3 is a system alert indicating a communication failure between the printer sensor and the toner cartridge chip. This error typically occurs when the cartridge is not properly seated or when debris interferes with the contacts. It is a critical error that pauses all printing tasks until the connectivity is restored.

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Common causes

  • 1Improperly seated toner cartridge.
  • 2Dirty or sticky toner chip.
  • 3Failure of the toner detection sensor on the mainboard.
  • 4Physical wear on the printer contact pins.

Solutions

Quick diagnosis

If you see the 54.3 message, first check if you recently installed a new cartridge. The root cause is often improper installation or a faulty cartridge chip.

Step-by-step solution

  1. Power off: Turn off the device for 60 seconds.
  2. Reseat toner: Remove the cartridge and reinsert it to ensure proper connection.
  3. Power on: Power the printer on to reinitialize the diagnostic sensors.

Prevention and maintenance

Always handle the cartridge by the edges. If necessary, clean the chip contacts with a soft eraser to remove residue that might prevent communication.

When to call a technician

If the error persists after testing with a different toner cartridge, the physical sensor inside the bay may be broken.

Device technical specifications

  • Technology: Monochrome laser
  • Performance: 19 ppm
  • Connectivity: Wi-Fi Direct, USB
  • Capacity: 150 sheets
  • Consumables: HP 44A (CF244A) toner
  • Recommended use: Home and small office
  • Drivers / official firmware

Steps to follow

  1. 1

    Power off

    Turn off the device for 60 seconds.

  2. 2

    Reseat toner

    Remove the cartridge and reinsert it to ensure proper connection.

  3. 3

    Power on

    Power the printer on to reinitialize the diagnostic sensors.

Frequently asked questions

This error points to an issue with the toner cartridge sensor, preventing the machine from recognizing the cartridge level or presence.

No, error 54.3 locks all printing operations until the sensor successfully detects the toner.

It uses the genuine HP 44A (CF244A) toner cartridge.

Insert the cartridge gently and avoid touching the gold chip contacts with your fingers.