I keep getting error 51331 when trying to connect to WiFi why

Wii Error Code 51330 and 51331, and 51332 means incorrect WiFI password and the wrong password was typed in.

I went to Nintendo tech forum and found some information that could help you. I have posted the link below.

Getting 51331 Nintendo Tech Forums

From Nintendo:
Error Code 51330, 51331, and 51332

It appears that the wireless security pass code for your home network may have been changed or is entered incorrectly on the Wii console. Click here for more information about WEP and WPA security, including how to access the settings for your Access Point.

If your wireless network password isn't wrong, reply. Hope this helps somewhat.

Hello,

The link below will go over error 51331 and how to resolve it. This error seems to be caused by a network configuration issue.

Click Here

Regards,
G33k

Sorry to hear you are having problems with your wii. According to Nintendo, error code 51331 is:
Error Code: 51331

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:
http://www.nintendo.com/consumer/wfc/en_na/ds/results.jsp?error_code=51331&system=Wii&locale=lang

Hi there, Error code 51331 means that there is a problem with the security key on your wifi connection. You will just need to through the setup on your console again taking care that you enter the security key the wep/wpa key on the back of your router exactly as it is(ie. Small letter, capital letter, number etc.) hope this helps

hi there,
error 51331 means there is a problem with your wifi security details. go through the wifi setup again and make sure the wep/wpa key on your router matches what you entered on the wii during setup. Hope this helps

Wii Error Code 51331 means there is a problem with wireless security.
Make sure your router’s WEP/WPA (one or the other not both)key matches the WEP/WPA Key you entered in the Wii.
If you double checked the WEP/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.

did u try to input ur wifi numbers and stuff in the settup mode and then try it

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.
If you still encounter the Wii Error Code 51331, try doing manually setting up the Wii’s internet connection. You can find your network information to enter into the Wii by doing this:
On your PC, click “Start” and then “Run.”
Type “CMD” into the field that appears to open a new window.
Type “IPCONFIG/ALL” and press “Enter” to display a list of internet settings. Locate the settings asked for by the Wii console during the Manual Setup process and enter them.
Power cycle the wireless router and modem by unplugging both from the wall. After waiting a minute, plug the modem back in and wait another couple of minutes for the modem to initialize. Plug the router in and wait for the router to initialize. Now try reconnecting the Wii to Nintendo WiFi Connection.

Hope this helps a little