P0420 Code Options?
Thread Starter
Instructor
Joined: Jul 2005
Posts: 158
Likes: 4
From: Arlington TX
P0420 Code Options?
Howdy folks, can't rid of this P0420 code (driver side cat problem)- it was showed up a few months ago, and I'd just clear it out. Now it is showing up within 2 days of clearing it.
It's an 01 vert, no mods, stock cats w/ flowmaster exhaust.
I have read this good write up on it:
http://forums.corvetteforum.com/show...ighlight=P0430
After reading that, I assume there are two O2 sensors on each side, before & after the cats- I was thinking of swapping the O2 sensors from side to side, so if there is an O2 sensor problem, it should throw a P0430 code (pass side). If there really is a problem, it'll still say P0420 (driver's side).
If it is a real problem, off to the stealership it goes- they (emissions) are warrantied for 100,000/10 years, right? do they usually figure out a way to charge you for something, or is it straight forward?
Thanks!
It's an 01 vert, no mods, stock cats w/ flowmaster exhaust.
I have read this good write up on it:
http://forums.corvetteforum.com/show...ighlight=P0430
After reading that, I assume there are two O2 sensors on each side, before & after the cats- I was thinking of swapping the O2 sensors from side to side, so if there is an O2 sensor problem, it should throw a P0430 code (pass side). If there really is a problem, it'll still say P0420 (driver's side).
If it is a real problem, off to the stealership it goes- they (emissions) are warrantied for 100,000/10 years, right? do they usually figure out a way to charge you for something, or is it straight forward?
Thanks!
Le Mans Master
Joined: Jul 2004
Posts: 7,727
Likes: 7
From: Twilight zone
St. Jude Donor '05-'06
I believe it is 8 yrs and 80k mi.
Straight forward,no fees
I was throwing BOTH codes 1 week short of 8 yrs( 38k miles)
The dealer replaced not only the cats,but the entire midsection( probably cheaper for them to do labor wise,since both cats were inefficient,)
But it was FREE!!!!
I had to get a failed smog test,brought it to the dealer,Bingo........done
If you still have plenty of time( miles and yrs.),I'll bet your other cat is not far behind....give it a lil' time and get them both done at once.
Straight forward,no fees
I was throwing BOTH codes 1 week short of 8 yrs( 38k miles)
The dealer replaced not only the cats,but the entire midsection( probably cheaper for them to do labor wise,since both cats were inefficient,)
But it was FREE!!!!
I had to get a failed smog test,brought it to the dealer,Bingo........done
If you still have plenty of time( miles and yrs.),I'll bet your other cat is not far behind....give it a lil' time and get them both done at once.
Race Director
Joined: Oct 2002
Posts: 16,477
Likes: 26
From: Gone
CI 6-7-8-9-10 Veteran
St. Jude Donor '03
Swap the rear sensors only, in the pipes, and at the harness.
If you get a P0430 after the swap, I would replace the sensor. If you still get a P0420, maybe your cat is bad.
These are fairly common codes to see after a header install with high-flow cats, but on a stock car, there probably is something wrong.
If you get a P0430 after the swap, I would replace the sensor. If you still get a P0420, maybe your cat is bad.
These are fairly common codes to see after a header install with high-flow cats, but on a stock car, there probably is something wrong.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Just break the connection on the air hose for the A.I.R. supply hose between the alternator and the fender,
spray in a goood shot of carb cleaner, blast that throught with some compressed air, then do a shot of WD-40 followed by a shot of air and hook everything back up!
That usually solves the problem for a year or so! Beats removing the intake or spending tons of cash!
BC
spray in a goood shot of carb cleaner, blast that throught with some compressed air, then do a shot of WD-40 followed by a shot of air and hook everything back up!
That usually solves the problem for a year or so!
Beats removing the intake or spending tons of cash! BC
Le Mans Master
Joined: Jun 2006
Posts: 6,979
Likes: 31
From: Wichita KS
If anyone has o2 sims that cheap please pm me, btw didnt mean to jack thread
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Thread Starter
Instructor
Joined: Jul 2005
Posts: 158
Likes: 4
From: Arlington TX
All right gents, I put her in the shop this morning. $90 to check it out, free if they find something. The service writer seemed pretty confident it'll be a warranty issue. (hope) If not, hopefully I'll get a really good explanation on what's going on.
Bill, thanks for your amazing fix'ums- I really think your blood cells are not round; they are little corvette logos... if it comes back unfixed, I'll clean out the air tube, and then buy O2 sims.
It also gave me the opportunity to vent about all my POS electronic problems- both door computers, both gas tank senders, anti lock brake control solenoid; and separated door panel material. (Yes, I've researched all these things, and fixed most)
I asked for a goodwill/safety fix for the brake solenoid, which they don't really do for second owners. We'll see. It did get me into a slight wreck with a curb.
Thanks guys
Bill, thanks for your amazing fix'ums- I really think your blood cells are not round; they are little corvette logos... if it comes back unfixed, I'll clean out the air tube, and then buy O2 sims.
It also gave me the opportunity to vent about all my POS electronic problems- both door computers, both gas tank senders, anti lock brake control solenoid; and separated door panel material. (Yes, I've researched all these things, and fixed most)
I asked for a goodwill/safety fix for the brake solenoid, which they don't really do for second owners. We'll see. It did get me into a slight wreck with a curb.
Thanks guys
not sure if they do them as a set, but replacement is good.