If you bought cheap O2 sensors at Autozone and still "have a light", the first question to ask is this: What are the code(s) now versus what were the codes before?
If all you are doing it changing parts, you will be working on this a long time - the only way to "figure it out" is to take in all information: symptoms, codes before, codes after, parts changed, history of issues with the car, etc.

I had multiple O2 codes on the Graphite - replacement of plugs and wires cleared everything right up. SOME O2 codes CLEARLY indicate a bad O2 sensor, many indicate a mixture, ignition, intake or manifold problem.


And this is not an introductory post.
Thread moved to appropriate forum.