My car is OBD2 so I have an extra O2 sensor on the cat. Last time I removed my cat I cut the wires from the O2 sensor, then respliced them together when I put the cat back on. Is there a way to just unplug that sensor somewhere rather than cutting the wires? Thanks...

 

bump

 

Well if you follow the wires on that 2nd sensor to the body you will find a gromet. Remove that and you will see the plug. Unplug it from there and you are good to go.