Yeah, I have disabled all the codes and it will still continuously run the 'catalyst efficiency tests' which sends the lambda momentarily lean/rich back and forth. I didn't notice any downsides to this, just looks a little funny in logs. I'm sure there's a way to fix it, but it was easier to just unplug the rear sensor and disable that single code, so that's what I'm doing currently.I recently unplugged mine and now under cruise my afr stays almost dead on 14.7 very occasionally jumping to 14.88 and right back. When it was plugged in it was constantly hunting between 13.9-15.2ish.