How To Fix Networking Failed To Start Multiplayer MW3

While Modern Warfare 3 players have received the green signal to play multiplayer, there are a few network issues that is troubling them. One of them is the ‘Networking Failed to Start’ error in MW3 that is leaving players baffled. Along with the error, you will get the code HUENEME – NEGEV. If you have played Modern Warfare 2, you won’t really be new to this error code.

Although there is no permanent fix for this network connection error, there are a few troubleshooting tips that might come in handy. While there is no assurance that your issue will be fixed, you might be able to play the game temporarily. Since the devs need to work and fix this issue with a patch, it might be some time before a proper fix is rolled out.

MW3 Networking Failed To Start Troubleshooting Tips

MW3 Networking Failed To Start Troubleshooting Tips
Image Source: Call of Duty via YT

Before you go through a list of troubleshooting tips, firstly we recommend you make sure that this is not a server issue. Check for any server outages to rule out that as the cause of the error. If the error is from your end, here are the troubleshooting tips you need to fix the ‘Networking Failed to Start’ error in Modern Warfare 3.

Check Internet Connection

Since all of these issues are connected to your Internet network, the first thing to do is make sure your Internet Connection is working. A speed test works splendidly and will give you an idea if this is the reason of the issue. Along with that, avoid any major download on any of your devices that might use up more Bandwidth to steer clear of connection issues.

Optimize Wireless Network

While Wireless network is certainly a convenient option, it might be a cause for the Networking Failed To Start issue in MW3. You can try using a LAN wire and connect directly to your Modem in order to receive an undisturbed amount of internet. This might even resolve the issue you have been facing.

Restart Modem & Router

Your modem and router might have collected a lot of unnecessary cache which might be giving you troubles while playing Modern Warfare 3. Restarting them will help you get a much faster and resolved network connection. Additionally, since modem and routers are running 24/7, they might get overheated on occasions. A simple restart is enough to cool it down and help it function better.

Allow MW3 on Windows Defender Firewall

Your Windows Defender Firewall settings might be blocking the game and this might cause the Networking Failed To Start issues. Here’s how you can add it to the Exception list:

  • Open the Firewall & Network Protection from your Windows Security.
  • Locate and click Allow an app through Firewall.
  • Look for the Modern Warfare 3 files in the list.
  • If you can’t find it, follow these steps –
    • Click on Change Settings.
    • Click on Add Another App.
    • Browse for your Modern Warfare 3 Files and then Add the game to the Exception list.
  • Once you add the game to the Exception list, it should not have any problem with Windows Defender.

Lastly, restart your game and PC to see if it works. If the error is still persistent, quickly write to MW3 Support and get a better solution to this problem. Since you are playing Modern Warfare 3, our dedicated section has the guides you need. Do check them out while you are here at Gamer Tweak.