I'm having this same issue with my 2015 Ranger 900. Turn the key and nothing happens: no lights, no relays clicking; it's dead. The battery is fine. The battery has a resting voltage of 12.9V. My accessories, which are wired separately from the the Ranger, all work normally. The Ranger, however, was dead.
Now, it seems to have healed itself. I am showing the same codes as the OP on my cluster.