400B4402

OKI B4402 Error 400: Paper Jam Fix

The OKI B4402 error 400 indicates a paper jam that has stopped the print process. This is a common notification that sensors have detected an obstruction in the internal path. Taking prompt action ensures you can clear the blockage without harming the printer's rollers.

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Common causes

  • 1Paper misaligned in tray.
  • 2Worn pick-up rollers.
  • 3Contaminated optical sensors.
  • 4Incorrect paper weight/media type.

Solutions

Diagnóstico rápido

The error 400 code means the paper failed to pass through the sensors within the expected timing. Look for misaligned pages or debris in the paper path.

Solución paso a paso

  1. Power off the printer.
  2. Open the covers to access the jam site.
  3. Pull out the paper gently in the feeding direction.
  4. Clean the rollers if debris is visible.
  5. Close covers and wait for the auto-reset.

Prevención y mantenimiento

Store paper in a dry environment and avoid using paper with staples or clips. Regular roller maintenance prevents future jams.

Cuándo llamar a un técnico

If jams occur repeatedly with no paper visible, a sensor may be failing or the pick-up rollers might need professional replacement.

Ficha técnica del equipo

  • Technology: Monochrome laser
  • Speed: Departmental performance
  • Connectivity: USB, network
  • Input capacity: 350+ sheets
  • Consumibles: OKI B400 series
  • Recommendation: High volume office
  • Official drivers / firmware

Steps to follow

  1. 1

    Open access

    Open front or rear access doors.

  2. 2

    Remove paper

    Gently pull the jammed sheet through the paper path.

  3. 3

    Check residues

    Inspect the printer for any remaining paper shreds.

  4. 4

    Close and reset

    Shut the doors and let the printer purge.

Frequently asked questions

It is a standard paper jam code indicating a sheet failed to transit the printer.

No, pulling forcefully can cause the paper to tear, making removal harder.

Use genuine OKI B400 series toner cartridges.

Ensure paper is properly loaded and the trays are not overfilled.