THERE IS DEFINITELY SOMETHING WRONG WITH DESTINY SERVERS i haven't touched my connection at all, but since rise of iron came out i'm getting many error codes all the time, even in trials of osiris and in crucible. it's very annoying so i hope bungie decides to fix this problem

Connection to host became unstable... our consoles host the instance and we are supposes to be setup to synch data directly with each other. Servers are supposed to only be in play to synch data to the databases in the background. If you haven't yet, go through the network troubleshooting guide. Check out your local stuff best you can. If it persists, may need to get your ISP's tier3 team on board. May simply have bad congestion or other factors causing packet loss along certain network segments. Such issues occurring in routing fall to your ISP to investigate and address...but not by the helpdesk guys. You need specifically Tier3 support.

Any time you play destiny you're in a fire team. Even on your own. Try rebooting your router and console.