3800 SES CODE- P0420.....hehhe..

[Royalgtp]

I got a code on my car, P0420....it is a cat converter code......

Any info for me on this?

If my cat is bad I will be pissed. I JUST BOUGHT A DAMM RTDP 1 year ago!!!!!!!!!! ONLY 13K MILES ON IT!!!!!


How much will it cost to cut the cat and put a 8-10 piece of tubing and get a 02 simulator? WIll our guy at FAIR do it?

WIll my exhaust smell like eggs now if I do this?

Click to read more...

 

[98 TGP TOY]

I JUST BOUGHT A DAMM RTDP 1 year ago

Heres your problem. I've had this dp for almost 2 yrs, and just started getting this code recently. Its not an actual problem, it just means your cat flows to well. So instead of getting the piece of straight pipe, just get the 02 sim and unplug the 02 sensor, but leave it in the exhaust. That would be cheaper. I just live with the code for now.

 

[imported_Ron Vogel]

Those R/T's don't seem to hold up too well, it might be that they are made to just meet OBD2, and a little age on them wears them out quick. I'm not so sure about it really being the cat though. I started throwing a code 520 (crosscounts not sufficient) after I fabbed up a new DP/hi-flow cat combo. I suspected a reversion problem because the exhuast had a funky drone to it. I put in a reducer inside the pipe that goes from 3" to 2 1/2" and the problem went away. I wonder if it's something like that. Royal, I remember your car being pretty quiet inside during normal driving. I don't know why, but mine is the opposite. With the headers is the car any more droney inside? Also, if the exhaust cools off too much before the rear 02 it may cause that code. You may want to wrap the DP anyway, so it's worth a shot.

 

[Royalgtp]

The car is still pretty quiet...

Headers didnt change the tone to much.


So should I just geta 02 sim?

 

[sr71_rgl]

Originally posted by RoyalGTP@May 12 2004, 10:05 AM
The car is still pretty quiet...

Headers didnt change the tone to much.


So should I just geta 02 sim?

Pretty standard problem w/adding a high flowing cat. Just get the sym (used preferably) and you'll be AG.

 

[iliveonnitro]

Jim works at James Dean now :x

He wont do it unless you leave his garage with a cat. He did a pipe for me, but made me leave with the cat on...for insurance/EPA reasons.

 

[SnM]

if you get a reprogrammed pcm, they can remove that code

 

[CoolGTX]

ive had an Original rt/dp/cat on my car since they were around, maybe 3 years now?

never 1 code thown..knocks on wood :banghead:

ive had it on stock headers and exhaust, then I added a 3 inch exhaust after the cat, then I added headers?cut dp, for the headers, so my cat is still hooked up.

the only thing I can think of is my setup is a 3 inch dp to the cat, then 2 1/2 exit for the cat, then I go back to 3 inch, then back down to 2 1/2 after the Y.

I know its screwed up, but it works for me with no Lights or codes.

maybe thats why my exhaust sounds differnt compared to others supposedly like mine.