391MC873dnv Enterprise

OKI MC873dnv Enterprise error 391: Toner issues

The OKI MC873dnv Enterprise error 391 occurs when the printer struggles to read the toner cartridge chip or manage supply levels for specific colors. This is a common connectivity issue. Knowing why error 391 appears on my OKI MC873dnv Enterprise helps you quickly fix it by simply checking the cartridge installation.

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Common causes

  • 1Dirty electrical contacts on the toner chip.
  • 2Cartridge improperly seated in rails.
  • 3Defective toner chip.
  • 4Internal supply sensor failure.

Solutions

Diagnóstico rápido

The control panel displays an error message regarding a non-recognized toner. Check the status LED to identify the specific faulty color.

Solución paso a paso

  1. Open the front cover and remove the toner indicated by the panel.
  2. Wipe the cartridge contacts and the internal pins with a dry, soft cloth.
  3. Ensure the cartridge is locked securely into its slot.
  4. If the error persists, swap it with another cartridge to rule out a faulty chip.

Prevención y mantenimiento

Only use genuine supplies. Clean the supply area with a soft air duster or dry cloth when changing cartridges to remove buildup.

Cuándo llamar a un técnico

If the error continues after trying a new cartridge, the supply sensor assembly inside the machine might be faulty.

Ficha técnica del equipo

  • Technology: Color Laser MFP
  • Supplies: OKI MC873 series (CMYK)
  • Management: Auto-calibration
  • Toner Capacity: High-yield
  • Recommended use: Corporate
  • Drivers / official firmware

Frequently asked questions

Error 391 occurs when the printer fails to detect the toner cartridge, often due to a damaged chip or dirty electrical contacts.

Remove the affected cartridge, clean the contacts with a dry, soft cloth, and reinsert it firmly.

Always use genuine OKI MC873 series toners to ensure stable communication between the supply chip and the unit.

Clean the supply compartment every time you change a cartridge to prevent residual toner buildup.

OKI MC873dnv Enterprise error 391: Toner issues | Vimazdev