so i put my LT's on today w/ new cats and the ory. there was only the holes for the front o2 sensors right in front of the cats. as far as the rear o2 sensors, i have no clue what to do w/ them. my buddy was in a hurry so i didnt have him weld some spots for them so they are just dangling there. when i get my tune done i'll just have them deleted but intill than what can i do w/ these things. my check engine light has already came on and i dont know how long i can go before anything bad happens. and i'm pretty sure its not a good thing to just let them hang there.

 

i just unplugged mine and got them tuned out a week later.

 

where can i unplug them at?

 

Follow the sensor wiring, there's a plug not too far upstream. Less than a foot.

 

thanks guys. i just hope i dont have any problems w/ the front 2 down the road.

 

Just look at it this way. Now that your not using the rears (only purpose is to monitor cat efficiency) you have 2 extras if the fronts go out!

Dustin

 

Will the truck run different in any way with them unpluged?

 

I posed this same Q some time ago. Sounds like Dustin may have answer.

Dustin,
Is that all the rears are for?
Extras from rear only work if the rear are good. My right rear fails/ goes bad quickly.

 

If I'm not mistaken the front and rear o2s are different.

 

I thought all 4 o2s were same P/N on trucks?