Cat bad?
Thread Starter
On The Tree
Joined: May 2006
Posts: 138
Likes: 1
From: BOISE
Cat bad? Well, My SES light came back on after a couple of months
I went had a code pulled on it (P0420) they said it was the cat?
The prob is once the SES light comes on, I can unplug the battery for an hour
and it will be gone. So, if the cat is bad wouldnt the code allways show
and if it is bad how bad will it hurt performance?
I went had a code pulled on it (P0420) they said it was the cat?
The prob is once the SES light comes on, I can unplug the battery for an hour
and it will be gone. So, if the cat is bad wouldnt the code allways show
and if it is bad how bad will it hurt performance?
TECH Senior Member
Joined: Dec 2001
Posts: 5,399
Likes: 3
From: Jacksonville, FL
Unplugging the battery resets the codes, P0420 sets immediately after it starts and fails. You can try swapping the rear 02's from side to side and see if it changes to P0430 - but it's most likely the drivers side cat - they're covered under warranty for 8yrs/80K.
TECH Addict
iTrader: (3)
Joined: Feb 2006
Posts: 2,498
Likes: 3
From: The dirty taint of the country. ...Los Angeles
I currently have the same problem. I know I need to replace it but its gonna cost me some dough. I'm at 100K so the fedral emisions thing isnt gonna work with me. Its just gonna keep come'n back on and dude,.....it holds back the cars performance by alot,.I can feel how bad it is especially when I hit the track.
On The Tree
Joined: Nov 2005
Posts: 128
Likes: 0
From: Hollywood, CA
Same here, I'm just over 90k and the ses light came back on. Cat is bad, but the $$$ is insane. Too bad i live in Cali or I'd just yank them off!! Got the "rich" smell also. When I get my Corsa catback I'll replace both cats.... 
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Originally Posted by Abe99
I have replaced both and one is going bad again but its falling apart so I will just drive it until I replace it with long tubes.
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I had the same code and then noticed the car bucking a bit and the tach would rev up to 4k on the highway in OD, yet I had no power. I ended up cutting it until I can install LT's.