so i got this code today and from what i found out its a bad cat,buttttt i took my cat off like 2 years ago and never got this code until toda, and i replaced my rear o2 sensor like a month go because the other idk how its broke and the wires were cut so what gives. is it maybe because i havet welded this support that goes somewhere around that area and my exhaust pipe keeps on moving around?
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Re: p0420
I wouldn't worry about the pipe moving around much, mine is only supported in the rear and I have no problems(don't have it supported on the tranny). I would just clear it and see if it starts coming back on regularly.08' L76 6.0L 4X4 Chevy EXT.Cab LTZ Vortec MAX with Snug top cover, Dynomax exhaust,Hptuners& K&N intake
96' Camaro M5 to A4 conversion, alot of mods . GT35R Turbo full suspension. Built engine
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Re: p0420
Yeah that is weird. Since you did remove your cat, the post cat o2 sensor is no longer necessary. You'll need an o2 sim or someone with HP tuners to delete the SES code so it doesn't show up in your dash lights.
That is weird that the code didn't come up for 2 years though because after I removed my cat it came on within a few days.
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Re: p0420
mine came on like two days ago i was like wtf how come it came on hahahhahahaha ima keep erasing it until the damm pcm gets the hint to piss off or something hahahaha over here where i live no one has the hp tuners so idk how ima clear that code. anyone here southern cali near san diego that has hp tuners hahahahLast edited by michael454rs@hotmail.com; 10-08-2008, 09:51 PM.
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Re: p0420
Here you go sir. http://www.afterthoughtsauto.com/o2sim.html
Just plug that into the o2 sensor harness and you're good to go. I have one on my DD, it works.
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Re: p0420
Do you have an o2 sensor before your cat? I'm a tiny bit unfamiliar with 97s which is what you have right? But it should go in the o2 sensor plug past the cat. If you do have an o2 sensor before the cat you may want to study on it a little more because I'm not sure what you'll want to do.
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Re: p0420
Originally posted by fbodyrs96 View Postwhat Connector Type do you need for a 96 3.8
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