If you look in the OBD II section you will see 3 O2 mode models that you can enable. Do all 3 of them. One is for CAT temp, one is for Flange temp and I belive the last one is for HEGO temp, the new cars will run a catalist diagnostic every so many drive cycles. It just throws a rich mix for a few seconds and looks for increased cat temp and HC count in the cat. Which off road pipe are you goin with? Hope to hear it....