How do you fix error code 86420 on Wii I cannot connect with friends?

Answer 1

Here's what the offical Nintendo site says:

Error Code: 86420This error occurs when there is a communication problem between players during online gameplay.

Try this:

1. If your router's security software (firewall) is turned on, it may block communication that is required for online gameplay. To fix this, try disabling the router's firewall*.
   1. Most firewall settings are located under the "Advanced" or "Security" tab.
2. If the problem still persists with the firewall off, you may need to open ports on your router through the Port Forwarding feature.
   1. Create a manual connection on your Wii and assign a static IP Address.
   2. Open ports 1 through 65535 as both TCP and UDP.
   3. Ensure the ports are forwarded to the same IP Address given to the Wii during the manual setup.

Trouble connecting to a friend?

If the above steps have not resolved the issue and you are trying to connect with specific friends, the problem could potentially be an issue on your friend's network. Your friend will have to perform these troubleshooting steps with their home network.

Using USB Connector or Lan Adapter? Please call 1-800-255-3700 so that we can assist you further.

*While Nintendo provides this information for our consumers' use, it is up to each consumer to determine what security needs they have for their own networks, and to decide how best to configure their network settings to meet those needs.