401ES2033a

OKI ES2033a Error 401: Authentication Fault

The OKI ES2033a error 401 indicates that the machine is rejecting the connection due to an authentication failure. Understanding what is the error 401 in OKI ES2033a is necessary to manage your network access policies. The printer simply does not recognize the user trying to access the device.

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Common causes

  • 1Incorrect login credentials from client.
  • 2Updated network security policies.
  • 3Locked user account on the printer.
  • 4Conflicting user sessions on the network.

Solutions

Quick Diagnosis

If you see a 401 error, the printer's security settings are blocking the incoming print job. Verify if authentication requirements have been altered.

Step-by-Step Solution

  1. Access the web interface as an administrator.
  2. Go to User Access settings.
  3. Validate that current users are correctly configured.
  4. Reset the printing service on the affected client machine.

Prevention and Maintenance

Keep user lists updated. Consider disabling network authentication if your office environment is already secured by a firewall.

When to Call a Technician

If you are locked out of admin access, a hardware factory reset by a technician is required to restore control.

Technical Data Sheet

  • Technology: Laser Multifunction
  • Output Speed: 33 ppm
  • Connectivity: Gigabit LAN, USB
  • Paper Capacity: High-capacity trays
  • Compatible Consumables: OKI ES2033 Toner
  • Recommended Use: Corporate office
  • Official Drivers / Firmware

Frequently asked questions

It means the credentials provided are invalid or have expired for printer access.

Check your user management settings in the printer's web admin panel.

It uses the ES2033 series toner.

Use centralized management or disable authentication if unnecessary.