The Wii is one of the most successful consoles of all time and for good reasons: it introduced the concept of motion controls to the world. But if you're still playing it today, then you might find some issues here and there. Let's look at Wii error code 51331 and how to fix it.
The Wii is not new to errors, such as connectivity issues with error 51330, but there might be other problems affecting the console.
So, let's look at some of the ways we can try and fix the Wii error code 51331 and get back to gaming.
How to fix Wii error code 51331
Similar to the other error, this is also a problem with connectivity. The first thing you might want to do is check that you've correctly entered the password on both your router and the Wii.
If that is not a problem, then perhaps you've been using a hidden SSID, which used to be a feature recommended for security reasons. Still, it is definitely not something you should be using anymore as the Wii does not support it anyway.
If that still is not your case, then perhaps the console is not automatically setting up the connection correctly. Check that your router uses the security protocol WPA2-PSK (AES) and that the Wii is also set to that one (manually checking).
How to fix a defective Wii Wi-fi module
Perhaps, the problem is inside the console itself and there is an internal wi-fi module that is not working anymore. Not all is lost, though, as you can find an Ethernet-to-USB dongle for purchase, so you can go ahead and use a wired connection, hopefully solving for good all connectivity issues.
If you're looking for more guides to get that Nintendo fix, you might definitely want to check out all about the Switch's IR camera and how to connect your Switch to a laptop.