Hello, I have an 07 Road King Classic, bine stock....had troubles with some electrical connections, bike would intermittently die riding, turns out loose ground. So for grins, I knew I had some historical codes, cleared them, ran the bike for a few and only one came back on. P0152, oxygen sensor high rich. So, doing some research, seems like it could be a number of things. What's a good methodical sequence to try out, starting with what would be most obvious. Lol. My electrical issue I wasn't methodical on my approach and it ended up being simple. Part of me just wants to replace the 02 sensor to start....but all my research, seems like a lot of guys do that and it doesn't work? Any help would be appreciative!