How to Fix the ‘Connection Failed’ Error in Call of Duty: Warzone

Call of Duty: Warzone is a popular online multiplayer game that has been played by millions of people worldwide. However, many Call of Duty: Warzone players encounter the “Connection failed” issue while trying to connect to the game server. This error message appears when the game fails to establish a connection with the server, and it can be frustrating for players who want to enjoy the game.

Fortunately, there are several troubleshooting steps that players can take to fix this issue. In this article, we will cover all aspects of the “Connection failed” issue in Call of Duty: Warzone and provide a detailed guide on how to fix it.

Troubleshooting “Connection failed” issue in Call of Duty: Warzone

Connection Failed' Error in Call of Duty
Connection Failed’ Error in Call of Duty

Check your internet connection

The first step to fix the “Connection failed” issue is to check your internet connection. A poor internet connection can cause this issue, so make sure your internet speed is up to par. You can do this by running a speed test on your internet connection. If your internet speed is slow, try restarting your modem and router or upgrading your internet plan.

Restart the game

If your internet connection is not the issue, try restarting the game. Sometimes, the game client can encounter a bug that prevents it from connecting to the server. Restarting the game can fix this issue.

Clear the cache

Clearing the cache can fix the “Connection failed” issue in some cases. To clear the cache, follow these steps:

  • Close the game client and any other applications that might be running.
  • Press the Windows key + R to open the Run dialog box.
  • Type “%ProgramData%” in the dialog box and press Enter.
  • Open the Blizzard Entertainment folder.
  • Delete the folder.
  • Restart the game client and try connecting to the server.
  • Disable your firewall or antivirus

Your firewall or antivirus software can sometimes block the game client from connecting to the server. Try disabling your firewall or antivirus software temporarily and see if that fixes the issue. If it does, you may need to add the game client to the exception list in your firewall or antivirus software.

Check the game server status

Sometimes, the “Connection failed” issue can be caused by the game server itself. Check the game server status on the Call of Duty: Warzone website or social media pages to see if there are any server issues. If there are, you may need to wait until the server issues are resolved.

Update your game client

An outdated game client can sometimes cause the “Connection failed” issue. Make sure you have the latest version of the game client installed. You can check for updates by launching the game client and checking for updates in the settings menu.

Check for network congestion

Network congestion can also cause the “Connection failed” issue. If there are too many devices connected to your network, it can affect your internet speed and cause connection issues. Try disconnecting any unnecessary devices from your network and see if that helps.

Use a wired connection

If you’re playing the game on a wireless connection, try switching to a wired connection. A wired connection is more stable and can help fix connection issues. Connect your computer or console directly to your router using an Ethernet cable.

Reset your router

Resetting your router can sometimes fix connection issues. To reset your router, unplug it from the power source for a few minutes and then plug it back in. This will reset the router’s settings and may fix the “Connection failed” issue.


In conclusion, the “Connection failed” issue in Call of Duty: Warzone can be caused by a variety of factors, including a poor internet connection, an outdated game client, network congestion, or server issues. By following these troubleshooting steps, players can fix the issue and get back to enjoying the game. If the issue persists, contacting support may be necessary.