I am sorry to hear you have been having these error codes recently, and we understand it is frustrating to hear that changing your home network can help if it was working previously, but many others have reported success by following the steps on our help pages, which I will post here just in case: http://www.bungie.net/en/Help/Article/11930 . In some cases, even power-cycling the router/modem and the console itself can get rid of these errors. Additionally, if you have things like Netflix and Twitch running at the same time it may be slowing down your internet. If none of the above-mentioned steps work, we are aware that sometimes this is out of the player's control, and we understand this may be an issue you cannot solve alone. In all cases, we’re constantly monitoring and improving our network services to keep Destiny up and running for as many players as possible.