I used a scan tool to force dump the learned values. The 2/1 sensor has begun fluctuating. The 2/2 sensor is possibly bad since it too is now floating but refuses to go below .9v. So I'm trying to understand how the first can be .2v and the rear be at .9v. I do not have the old sensors as a couple of them were melted to the old engine harness when the previous owner had some sort of engine fire.