Error code E21 occurs when you start up your Xbox 360 console

Overview

If you see error code E21 when you start up your Xbox 360 console, it means that the installed Xbox console software is not the most current version.

Read this page to learn about error 21 and what you can do about it.

Error code and message

Error code E21 contains the following message:

Your Xbox requires service

E21

Problem

If you get this message and error code when you start up your console, it means that the installed Xbox console software is not the most current version.

Solutions

Update your Xbox 360 console software.

Related Issues

Xbox error code/status code search

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