- If you encounter the error code 25509 while playing your favorite Modern Warfare 2 game, note that it's a common error that mostly arises due to an issue with the router/modem.
- The error could show up even when the internet connection may be stable, or even if you have recently updated the game to its latest version.
- Sometimes, the error code 25509 may also occur due to an active VON connection or a proxy server that may interfere with the game functioning.
If you are a fan of Modern Warfare 2, you may encounter the error code 25509 while matchmaking. MW2 has been known for glitches and errors due to bug patch updates. However, 25509 is a relatively new error reported by many gamers off-late.
What causes error code 25509 in MW2?
- A glitch with the network connection – In most cases, it’s the network cable that’s not properly plugged into the router/modem or broken that triggers the error.
- Problem with the console – If you are using a gaming console, it could be an issue with the device itself.
- VPN/Proxy interference – Sometimes, you may encounter the error code 25509 due to an active VPN or Proxy.
How do I fix error code 25509 in Modern Warfare 2?
Try some preliminary checks to see if one of them helps fix the error:
- Restart the Xbox console.
- Check for Warzone game updates. One of the most common errors does not allow users to update the game and throws up not enough free space errors, yet you can fix them in no time.
If none of the above help, we have some proven workarounds to help you fix the error code 25509.
1. Reset your network hardware
- Remove the power cord from the back of the router, modem, or gateway, and wait for 5 minutes.
- If using both a router and a modem, disconnect the power cord from both devices.
- Long hold the Xbox button on your console till it shuts down, and then wait for 2 minutes before you start the device again.
- Once 5 minutes are up, connect the modem or gateway, and now wait for all the lights to switch on and be normal again. Repeat for your router too.
Now that you successfully power cycled and reset the network hardware, you should not encounter the error anymore.
2. Reset the console keeping games and apps
- Press the button on the Xbox device to open the guide.
- Next, click to expand Profile & system, and select Settings.
- Now, under Settings, click on System.
- Under system settings, on the right, click on Console info & updates.
- On the next screen, click on Reset console on the left.
- You will now see a prompt asking Reset your console? Click on Reset and keep my games & apps.
Once done, you can now continue with your game without coming across the error code 25509 in MW2 anymore.
3. Turn off VPN and proxy
- Press the Win + I shortcut keys to launch Windows Settings, click on Network & Internet on the left, and then click on VPN on the right.
- On the next screen, click to expand the VPN connection on the right you want to disable and click Disconnect.
- Now, return to Network & internet, and click on Proxy.
- Here, under Automatic proxy setup, turn on the Automatically detect settings option.
- Next, under Manual proxy setup, disable the Use a proxy server option.
In case you encounter a proxy error, follow the troubleshooting methods in our detailed post to fix the proxy error in Windows 11.
But, if you are using a third-party service like the Express VPN you can follow the method in our post (also applicable for Windows 11) to disable VPN temporarily or for good.
If all of the above methods fail to fix the error code 25509 in MW2, you can try contacting Call of Duty support via chat, contact form, or over the phone.
While it’s a new error code that has been bugging game lovers recently, these are some of the working solutions we found from different forums.
If you found any other solution for the error code 25509, do let us know in the comments box below.
Still having issues? Fix them with this tool:
If the advices above haven't solved your issue, your PC may experience deeper Windows problems. We recommend downloading this PC Repair tool (rated Great on TrustPilot.com) to easily address them. After installation, simply click the Start Scan button and then press on Repair All.