Question about Video Game Consoles & Games
Wii Error Code 51331 means there is a problem with wireless security.
Make sure your router’s WEP key matches the WEP Key you entered in the Wii.
If your router is using 64-bit encryption, the WEP Key must be 10 characters.
For 128-bit encryption, the WEP Key must be 26 characters.
WEP Keys can only use the characters 0-9 and A-F.
If your router allows more than one WEP key to be entered at a time, make sure the key you’re using is on slot one.
If you double checked the WEP or WPA key with the router and the Wii and they match, but you still receive the Wii Error Code 51331, then MAC filtering may be enabled in the router. You will have to add your Wii’s MAC address to the router’s allowed list. You can do this by logging into your router and going to the “access control, access list, or network filter” settings.
If you still have trouble with Wii Error Code 51331, try changing the wireless router’s channel to 1 or 11. This may increase download speed.
Check Nintendo’s router page for special notes on your router if available. Follow the instructions of the special notes.
Your wireless router must broadcast in mixed or b/g mode and cannot be set to “g” only mode.
Posted on Jul 03, 2008
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Posted on Jan 02, 2017
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Unable to connect to your wireless network
This error code is more specific to having incorrect security settings on your wii. Your encryption key is wrong when trying to connect to your wireless internet. Double check your encryption key with your router's settings and try again.
You can see the official support article from Nintendo here:
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