Wondering how to fix PS4 NAT Type Failed error, then very first check your internet connection as the problem is commonly faced by the PS4 users due to poor internet connection or due to the incorrect network settings in the PS4.
As per the gamers they are facing difficulty in chatting online with other users and are unable to hear other gamers in chat.
And as a result, the error message PS4 NAT Type Failed to appear on their screen.
Well if your internet connection is working fine but still dealing with the PS4 NAT type failed error, then try other best possible fixes listed in this tutorial.