codes

[farmtruc]

Acutually, insufficient switching is kind of common when headers are installed. I see this all the time.

Here's what I don't get, header companies sell you a set of headers, ask if you want the ORY or cats. If you pay extra and get the cats, they flow to well, or the headers disrupted the o2 readings, that you have have to get the pcm tuned anyway to delete the cats and o2's.
I see this a lot with the camaros and vettes, especially the vettes.
Not sure exactly why, but when headers are installed, the pcm doesn't like the tight tolerance the o2 must obey. Those codes are usually thrown during idle and easy driving, give it a little gas and the o2's respond correctly.
I've requested from hptuners, to give me tables that allow adjustment of the high and low values, but nothing, it's only been a couple years now, lol.
You can turn the ses light off, but keep the code enabled, that's one solution. Or, like it was mentioned, swap the stock o2s with others that respond better.
Or if they're bad...

good luck,
allen

[sprayedenali]

the problem isnt with the headers at all, is with the floor pan. the 0s sensor hits the floor whenever the engine gets revved up.

[GasGuzzler]

Acutually, insufficient switching is kind of common when headers are installed. I see this all the time.

Here's what I don't get, header companies sell you a set of headers, ask if you want the ORY or cats. If you pay extra and get the cats, they flow to well, or the headers disrupted the o2 readings, that you have have to get the pcm tuned anyway to delete the cats and o2's.
I see this a lot with the camaros and vettes, especially the vettes.
Not sure exactly why, but when headers are installed, the pcm doesn't like the tight tolerance the o2 must obey. Those codes are usually thrown during idle and easy driving, give it a little gas and the o2's respond correctly.
I've requested from hptuners, to give me tables that allow adjustment of the high and low values, but nothing, it's only been a couple years now, lol.
You can turn the ses light off, but keep the code enabled, that's one solution. Or, like it was mentioned, swap the stock o2s with others that respond better.
Or if they're bad...

good luck,
allen

Sounds like it's because the thin wall long tubes allow the exhaust gasses to "excessively" cool before reaching the catalyst that requires high EGT to work properly....and the post cat O2 knows it. Under load the thin wall headers heat up faster than the thick (already hot) cast manifolds and the O2's repsond.

[sprayedenali]

so you guys are saying that the problem isnt that the sensor is hitting on the floor, to the point where it bent the sensor and dented the floor, but that the headers are just messin with it?

[GasGuzzler]

It should not hit the floor. The other posts are theories on proper sensor operation.

[foggy]

You need to weld in a new bung to reposition that sensor.

[sprayedenali]

thats what im saying, the way the exhaust shop welded in the cat, the sensor is hitting the floor

[sprayedenali]

so now that ive gotten everyhing moved around and still have the cel on i got it checked again and the only one that alarms me is p2271 and p2273. O2 Sensor Signal Stuck Rich Bank 1 Sensor 2 and the same for bank 2. what does this mean?

[foggy]

those are for your rear O2's that you don't have hooked up. Custom tune will take care of those.

[CHEVROLADE]

Damm Mitch,this Really Sux To Hear Bro.i Hope You Get These Problems Resolved.
My Buddy Was Having The Same Problems On His Camaro,we Switched To Those Bosch 13111 And It Runs Like A Champ Now,also The Ses Lite Went Away.