Everywhere I look on the tech data they are telling me that I have 4 O2 sensors on the car. I have confirmed that the O2 sensor is causing my check engine light. Under the car I only can locate 2 sensors, 1 in the first bank(cylinders 1 thru 3) located right before the converter, the 2 one is right behind the converter. #1 has the shorter harness, #2 has the longer harness. I cannot locate anymore sensors. I don't have the tech manual on the car yet and I can't find any pics on the web as far as location of O2 sensors on the car. Can you guys help me out?