#421, "RE: After cat O2 sensor connector......................" In response to In response to 3
Unplugging it does not help in any way and yes, it DOES trip the check engine light. I only unplugged it because my downstream o2 got ripped out (the wire) so its useless. I unplugged it to swap in a Bosch one, but the wire was too short, and I'm too broke to go buy and OEM one yet...it doesn't affect the car though since it is just checking to see if the cat is working properly for emissions.
