e1LaserJet Pro M15x

HP LaserJet Pro M15x Error E1: Troubleshooting

The HP LaserJet Pro M15x error e1 is a common notification that indicates a paper size mismatch. Your printer is alerting you that the document size you requested does not match the actual paper detected in the tray. This guide provides quick steps to reconcile these settings and get back to work.

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Common causes

  • 1Misaligned guides: Loose guides shifting the paper.
  • 2Driver setting mismatch: Printer set to 'Legal' while loading 'A4'.
  • 3Sensor blockage: Dust or debris blocking the sensor path.
  • 4Paper curling: Curled edges causing improper sensor detection.

Solutions

Diagnóstico rápido

E1 is essentially the printer saying 'I don't recognize this size'. Check your tray and verify if you have A4 or Letter paper and if your software settings reflect that.

Solución paso a paso

  1. Align guides: Slide the paper guides to snuggly fit the paper stack.
  2. Software match: Ensure the paper size in the document settings matches the loaded paper.
  3. Sensor check: Use a soft cloth to gently clean the paper sensor area.
  4. Cancel: Hit cancel to clear the current error state and restart the job.

Prevención y mantenimiento

Keep the paper guides snug. Over-filling the tray beyond the marker can also cause misreading, so keep it within limits.

Cuándo llamar a un técnico

If the error E1 appears even with correct settings and paper alignment, there might be a physical sensor malfunction that requires repair.

Ficha técnica del equipo

  • Technology: Monochrome laser
  • Speed: 19 ppm
  • Connectivity: USB 2.0
  • Input capacity: 150 sheets
  • Compatible toner: HP 44A (CF244A)
  • Recommended use: Personal desk printer
  • Official Drivers / firmware

Steps to follow

  1. 1

    Align guides

    Slide the paper guides to snuggly fit the paper stack.

  2. 2

    Software match

    Ensure the paper size in the document settings matches the loaded paper.

  3. 3

    Sensor check

    Use a soft cloth to gently clean the paper sensor area.

Frequently asked questions

E1 means there is a mismatch between your selected document size and the physical paper detected.

Usually not; it is a settings-based error that clears once paper is loaded correctly.

HP 44A (CF244A) is the required toner cartridge.

Double-check your print dialogue window for paper size settings before every print job.