Thread: O2 Sensor with headers

Got a 05 GTP going to put headers with dp and no cat. What happens to the rear O2 sensor?

you take it out, throw it in the trash, and disable the o2 code in your PCM otherwise you get to stare at an SES light forever.

that doesnt let you pass emissions or know when something actually IS wrong with your car.

What will happen if i just leave it in? Will that hurt the car or its performance. THe only problem is that I am no where near a place to get a tune and have no knowledfge on it myself.

nothing will be hurt, but its basically useless if you dont have a cat.

Im just thinking about saving $200 and going catless but if its better to run a cat ill get a high flow. Will the high flow still give me O2 errors?

it might, but i never had a problem with it.

Cat will make it sound better too.

with the pacesetters the rear o2 is moved further down the exhaust, with the suplied extension i retained the 02. it threw a code at first for no cat, but went away shortly after.

Or...just delete the code and do it the right way the first time via a tuner...find someone close to you thats able to do that.

id love to go somewhere near me for a tune but thats not an option. Too far away. No-one within 400 miles at least

like said, mine threw a code for all of 5 mins then it went away. its really not an issuie

or just buy a cheapo scanner and delete it when it pops up LOL

but it went away... on its own.


car just had to cycle threw. no need for the scaner.

shouldn't it be tuned, cat or not, with headers to prevent it from running leaner? Or is this not an issue?

Yes they will make if leaner.