Most of those error codes you listed are specific to either WiFi issues on your end, ISP disconnects/glitches, or internet congestion in your area. Make sure to check out these troubleshooting steps to be absolutely certain it's not your own connection: https://www.bungie.net/en/Help/Troubleshoot?oid=13610 https://www.bungie.net/en/Help/Troubleshoot?oid=13603 https://www.bungie.net/en/Help/Troubleshoot?oid=13602 Besides the most common first step being to switch to a hard wired connection if you're using WiFi, you may be having an issue with your ISP and would need to contact them for help identifying the problem if none of the above helps resolve the disconnects. If disconnects with any of these specific error codes become common for a lot of players at the same time, it would point to at least one of them being on Bungie's side and you should look to their @BungieHelp Twitter account for announcements.