Quote
What type scanner do you have? I bought mine off the Snapon truck used and have no manual either

The scanner I am using is a Solus. The link I have in the original post covers most of what I needed, so check that out.

As to my original question, after reading the linked manual, Chrysler feeds the O2 sensor 2.5v, so it oscillates between 2.5-3.5. So, my graph is reading correctly. I need to adjust the scale and take another look at the data with the engine at 2000 rpm. I suspect this O2 sensor is on its way out.

Lots to learn!

-Dave