My eclipse is a 2000 gt with the v6. I have a check engine light on so i ran the obd2 scaner to see what it would come up with. It comes up with a p0420 bank 1. My question is, is bank one the sensor before the converter or after? Im assuming its the one before but would like another opinion before I start tearing it apart. thank you

 

I would also like to remind that the 2000 GT only has 2 o2 sensors. One of them pre cat and one post cat. Thank you

 

here is info: http://www.aa1car.com/library/p0420_dtc.htm