381B401d

OKI B401d error 381: Paper jam troubleshooting

OKI B401d error 381 points to a failure in the paper intake sequence. This usually triggers when the feeding sensor does not detect the sheet's movement within the expected time frame. Inspecting the input tray and the internal print engine is the fastest way to resolve it.

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Common causes

  • 1Improper alignment in the paper tray.
  • 2High humidity causing paper to stick together.
  • 3Small torn paper fragments covering the sensor.
  • 4Worn rubber pickup rollers.

Solutions

Diagnóstico rápido

The error 381 is a standard paper jam indicator. If the paper doesn't move, check for misaligned sheets in the tray or small torn remnants blocking the sensors.

Solución paso a paso

  1. Tray Removal: Pull out the input tray completely.
  2. Clear Blockage: Remove stuck sheets and check for hidden scraps.
  3. Inspect Internal: Open front access to check the transfer roller area.
  4. Reset: Firmly close all hatches; the machine will clear the error automatically.

Prevención y mantenimiento

Use dry, standard-weight paper. Store your paper in a low-humidity environment to prevent sheet adhesion, which is the leading cause of multiple feed errors.

Cuándo llamar a un técnico

If the motor runs but the rollers do not pick up paper, the feed clutch or the pickup roller mechanism may require professional intervention.

Ficha técnica del equipo

  • Technology: Monochrome laser
  • Input capacity: 250 sheets
  • Paper weight: 60-120 g/m²
  • Consumables: B401 toner cartridge
  • Maintenance: Cleaning of pickup rollers
  • Drivers / firmware official

Steps to follow

  1. 1

    Remove paper

    Pull out the paper tray and remove any stuck or torn sheets.

  2. 2

    Internal inspection

    Open the front cover and check the transfer roller for debris.

  3. 3

    Close and reset

    Ensure all covers are firmly shut so sensors can reset.

Frequently asked questions

Error 381 indicates that a sensor has detected a blockage or feed error in the paper path.

Yes, pulling paper too forcefully can leave scraps inside, leading to persistent sensor errors.

Yes, thin or damp paper often causes multiple sheets to feed at once, causing jams.

Clean the pickup rollers with isopropyl alcohol occasionally to ensure steady grip.