Monitor the O2 signal when the engine is idling for your baseline data. (My car is about 0.6V) while monitoring the idle data vary the throttle position (rev the engine) the O2 monitor will transition from approximately 0.2 ~ 0.8V if it is functioning properly. While this might not be the most technical post on the forum this is my understanding of how the software can be used to troubleshoot the O2 sensor functionality. Hope this helps