Only the 802.11g and 802.11b wireless formats are supported for the Wii console of Nintendo. So, you face the error code 51330 or any other if the wireless router is using any other wireless mode. If this is the case for which you are facing the issue, you have to get into the settings of your wireless router.
To edit the settings of your wireless router, you have to follow the manual of your router or you can look for it on Google, searching your router’s model number. Setting procedures are different for different routers.
Fix the connection between your Wii console and the access point after changing the settings. Check if this method has fixed the issue you were facing.