Code 32
Thread Starter
Melting Slicks
Joined: Mar 2003
Posts: 2,898
Likes: 0
From: Oklahoma City Oklahoma
Code 32
Since getting rid of all my cats, my SES light came on. I read the code, and it came back a Code 32. I know that's an EGR related code, but if I remember right, it's also somewhat of a generic code, and it could be related to components other than the EGR valve. I know the 02 sensor has it's own code (13) but I've also heard that an 02 sensor can also show up as a Code 32.
Since I'm not a real big believer in coincidences, I have to believe that the SES light is related to the removal of the cats. I have a hard time believing that the EGR valve failed just like that, so I cleared the codes, and installed a new 02 sensor.
The only thing that I can think is that the muffler shop might have damaged the 02 sensor when they cut the cats off. They beat on that left y-pipe pretty hard with their pipe bell tool. I'm wondering just how sensitive the 02 sensor might be to a shocking blow.
After I put on the 02 sensor, I took the car out and drove it pretty hard, in fact, a LOT harder than I'm comfortable with, but the light didn't come back on. If it comes back on, then maybe I'll have to look deeper. I might have to eat crow on my non belief of coincidences, but I think I'm on the right track here.
Any input/opinions/ideas wotud be greatly appreciated. Thank you.
Since I'm not a real big believer in coincidences, I have to believe that the SES light is related to the removal of the cats. I have a hard time believing that the EGR valve failed just like that, so I cleared the codes, and installed a new 02 sensor.
The only thing that I can think is that the muffler shop might have damaged the 02 sensor when they cut the cats off. They beat on that left y-pipe pretty hard with their pipe bell tool. I'm wondering just how sensitive the 02 sensor might be to a shocking blow.
After I put on the 02 sensor, I took the car out and drove it pretty hard, in fact, a LOT harder than I'm comfortable with, but the light didn't come back on. If it comes back on, then maybe I'll have to look deeper. I might have to eat crow on my non belief of coincidences, but I think I'm on the right track here.
Any input/opinions/ideas wotud be greatly appreciated. Thank you.
Team Owner
Joined: Sep 2001
Posts: 62,157
Likes: 1,731
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
No, the O2 is unrelated to this code, dont even worry about that. If your gas mileage is good then theres no reason to suspect O2 as the culprit of anything, much less code 32's.
Did they do anything to the EGR pipe? What exactly has been done to your whole exhaust?
Did they do anything to the EGR pipe? What exactly has been done to your whole exhaust?
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
After you replaced the O2, did you clear the codes? Since your drive have you LOOKED for codes? If any reappear, the best, most efficient course of action is to follow the trouble shooting charts in your FSM.
RACE ON!!!
RACE ON!!!
Thread Starter
Melting Slicks
Joined: Mar 2003
Posts: 2,898
Likes: 0
From: Oklahoma City Oklahoma
Originally Posted by vader86
No, the O2 is unrelated to this code, dont even worry about that. If your gas mileage is good then theres no reason to suspect O2 as the culprit of anything, much less code 32's.
Did they do anything to the EGR pipe? What exactly has been done to your whole exhaust?
Did they do anything to the EGR pipe? What exactly has been done to your whole exhaust?
2. When they cut the cats off, they cut a small hole in the pipe where the main cat had been, and put the air tube in, and welded it. All they did was cut everything out, and weld pipe back in their place.
3. Since having the clutch done a few weeks ago, the car has been making an odd noise under acceleration. I assumed that it was clutch related. It's not a mechanical noise....sounds more like an air leak.
Could the shop that did the clutch have left something undone? The noise was no different after I had the cats cut off. Other than dropping the exhaust off of the car when they did the clutch, is there possibly something that they could have done that is EGR related? It's really hard to tell where the odd noise is coming from, but it is definitely coming from the front of the car. Also, the noise is not apparent when the car is sitting still, and I rev it up, which is why I assumed it was clutch/transmission related.
Now I'm totally confused.
Team Owner
Joined: Sep 2001
Posts: 62,157
Likes: 1,731
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
EGR pipe leads from the #8 manifold to the intake manifold.
If youre going to take out the cats, then why did they put the AIR pipe back together?
EGR system isnt activated under acceleration, it comes on at times when youre at a consistent part throttle (like hwy cruising, for example) and the engine is over 170F.
Youre going to have to go through all the Code 32 troubleshooting.
http://members.shaw.ca/corvette86/Code%2032.pdf
If youre going to take out the cats, then why did they put the AIR pipe back together?
EGR system isnt activated under acceleration, it comes on at times when youre at a consistent part throttle (like hwy cruising, for example) and the engine is over 170F.
Youre going to have to go through all the Code 32 troubleshooting.
http://members.shaw.ca/corvette86/Code%2032.pdf
Thread Starter
Melting Slicks
Joined: Mar 2003
Posts: 2,898
Likes: 0
From: Oklahoma City Oklahoma
Originally Posted by vader86
EGR pipe leads from the #8 manifold to the intake manifold.
If youre going to take out the cats, then why did they put the AIR pipe back together?
EGR system isnt activated under acceleration, it comes on at times when youre at a consistent part throttle (like hwy cruising, for example) and the engine is over 170F.
Youre going to have to go through all the Code 32 troubleshooting.
http://members.shaw.ca/corvette86/Code%2032.pdf
If youre going to take out the cats, then why did they put the AIR pipe back together?
EGR system isnt activated under acceleration, it comes on at times when youre at a consistent part throttle (like hwy cruising, for example) and the engine is over 170F.
Youre going to have to go through all the Code 32 troubleshooting.
http://members.shaw.ca/corvette86/Code%2032.pdf
They put the AIR tube back in the pipe so it wouldn't make noise, since I wanted to leave the air pump intact, in case I ever had to put another cat on.
I'm going to have to take the car in, because I'm not tech savvy enough to run the diagnostics myself.
I can't help but think this problem is related to the removal of my cats. I've not had so much as a second's problem with this car, up until I had the exhaust altered.
Racer
Joined: Jun 2005
Posts: 284
Likes: 2
From: Burton Texas
I had the same problem with my 91 6 speed after gutting the converters and putting on Monza mufflers.
The EGR utilizes exhaust backpressure to force the exhaust into the intake. Without the backpressure, the ECM's self diagnostic test, which in a '91 looks for a change in the integrator value, will set a code 32.
The solution is to have the MemCal altered to eliminate the EGR test, or set the test parameters outside of normal operating conditions. ski-down-it did mine.
The EGR utilizes exhaust backpressure to force the exhaust into the intake. Without the backpressure, the ECM's self diagnostic test, which in a '91 looks for a change in the integrator value, will set a code 32.
The solution is to have the MemCal altered to eliminate the EGR test, or set the test parameters outside of normal operating conditions. ski-down-it did mine.
