Error code 118-0502

Applies to: Wii U


What does this error code mean?

This error code indicates that either you or the other players you are connecting with are experiencing a problem with the network environment, and this is causing the difficulties for communication and online matchmaking.

What can I do?

If you are using a public network, this could be the cause of your issue and in some cases it might be difficult to fix it without contacting the network administrator. If you are using a secure/personal network, please try the following before contacting Customer Support.

1. System Update

Is your Wii U system up to date? Please follow the instructions below to see if your device is running the latest system version.

a) Select System Settings on the Wii U Menu.

b) Scroll to the right and find System Update, then tap the icon.

c) Tap Update to begin the update. If you receive a message telling you that your system is already up to date, tap OK to end the process. If it shows a version you can install, follow the instructions to proceed with the system update.

Please note: please make sure to keep the Wii U GamePad plugged in during the update as it may take a while.

2. Connection Test

a) Go to System Settings on the Wii U Menu.

b) Select Internet icon (A Button to confirm) > Connect to the Internet > then Connection List.

c) Select your internet connection, and then Connection Test.

d) The result shows if there are any connection problems either between your Wii U and your network device, or with the internet. Please also take a note of the Support Code on the bottom-right corner of the screen (if one displays), as you might need it when you Contact Us.

CI_TroubleShooting_WiiU_08_ConnectionTest1_enGB.jpg

Types of connection problems and solutions

For ALL TYPES of connection problems

  • Restart your network device (router, access point, etc.).
  • Remove any obstacles around the device and keep devices apart by 2-3 metres.
  • Stop using electronic devices such as microwaves and wireless phones for a moment.

If there’s a problem between your Wii U and the access point

CI_TroubleShooting_WiiU_09_ConnectionTest2_enGB.jpg

  • Input the security key of your network device into the Wii U correctly. To do this, on the Wii U Menu, go to Settings > Internet > Connect to the Internet > Connection List > select the connection with Wii U/Wii logo on it > Change Settings > Security. Then select the correct security and input the correct information.
  • If this doesn’t work, try again later: it’s possible that your network is temporarily unstable or is busy.

If there’s a problem between the access point and the internet

CI_TroubleShooting_WiiU_10_ConnectionTest3_enGB.jpg

  • Check if other devices (cell phone, tablet, PC, etc.) using the same access point have stable internet connection.
  • Check if all the cables are correctly inserted, and not damaged.
  • Input the security key of your network device into the Wii U correctly. To do this, on the Wii U Menu, go to Settings > Internet > Connect to the Internet > Connection List > select the connection with Wii U/Wii logo on it > Change Settings > Security. Then select the correct security and input the correct information.
  • Set the MTU (Maximum Transmission Unit) value on your Wii U system to 1300. To do this, select Settings > Internet > Connect to the Internet > Connection List > select the connection with Wii U/Wii logo on it > Change Settings > scroll twice to the right > MTU Value > Input 1300 > OK.
  • If this doesn’t work, try again later: it’s possible that your network is temporarily unstable or is busy.

If your connection test was successful

CI_TroubleShooting_WiiU_11_ConnectionTest4_enGB.jpg

  • Set the MTU (Maximum Transmission Unit) value on your Wii U system to 1300. To do this, select Settings > Internet > Connect to the Internet > Connection List > select the connection with Wii U/Wii logo on it > Change Settings > scroll twice to the right > MTU Value > Input 1300 > OK.
  • If this doesn’t work, try again later: it’s possible that your network is temporarily unstable or is busy.

If the problem still persists, please proceed to the following Advanced Solutions. Usually you only need either No. 3 or No. 4. If you’re unsure about following the instructions, please ask a friend or family member to help you.

3. Enable DMZ (Demilitarised Zone) on your router

a) First, please make sure an IP address is manually assigned to your Wii U system before enabling the DMZ mode.

b) Log in to your router’s setup page.

c) Find “DMZ” or “Demilitarised Zone”. It depends on the router, but you’ll probably find it under Security, Application, Firewall or Gaming, etc.

d) Follow the instructions from your provider and enable the DMZ feature.

e) Enter the IP address of your Wii U system.

f) Apply/Save the changes.

g) Try to connect online with your system, and check if you can play against other players without problems. Please note: It may take a short while until the DMZ settings are applied.

4. Port Forwarding

a) First, please make sure an IP address is manually assigned to your Wii U system before setting up port forwarding.

b) Log in to your router’s setup page.

c) Find “Port Forwarding”. It depends on the router, but you’ll probably find it under Security, Application, Firewall or Gaming, etc.

d) Enter required information:

[Ports] 442 - 445 and 28000 - 29500

[UDP] Allow traffic to all addresses. This is necessary for the peer-to-peer connection during the game (Ports 1 - 65000)

e) Enter the IP address of your Wii U system.

f) Apply/Save the changes.

g) Try to connect online with your system, and check if you can play against other players without problems. It may take for a short while until the port forwarding settings are applied.

If the solutions suggested above don’t solve your issue, please Contact Us with the following information:

  • Name of your internet service provider.
  • Name of the manufacturer and the brand of your network device (Wi-Fi access point, WLAN router, etc.).
  • Serial number of your Wii U console.


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