SES Code 32
Thread Starter
Intermediate
Joined: Apr 2009
Posts: 34
Likes: 0
From: Huntington Beach California
SES Code 32
I've sorted out my SIR code 16 & SRC code 42, now on to my SES code 32.
I have a '90 coupe L98, all stock except previous owner installed what appears to be MAMO cat back exhaust with crossover (2.25" pipes).
I'm getting an intermittant code 32 (EGR) and wondering if the reduction in backpressure due to the cat back exhaust could be causing it? I smogged the car (Calif car) a month ago and all emissions were a fraction of the allowables both at idle & 2500 RPM tests. Just wanted to check if this exhaust could throw this code before I go through the diagnostic tree. Seems to happen at medium to heavy throttle, but only intermittingly.
Thanks for any input.
I have a '90 coupe L98, all stock except previous owner installed what appears to be MAMO cat back exhaust with crossover (2.25" pipes).
I'm getting an intermittant code 32 (EGR) and wondering if the reduction in backpressure due to the cat back exhaust could be causing it? I smogged the car (Calif car) a month ago and all emissions were a fraction of the allowables both at idle & 2500 RPM tests. Just wanted to check if this exhaust could throw this code before I go through the diagnostic tree. Seems to happen at medium to heavy throttle, but only intermittingly.
Thanks for any input.
Racer
Joined: Nov 2005
Posts: 456
Likes: 3
From: Sumner Texas
The code 32 is USUALLY the thermo sensor that is in the insulated line next to distributor and next to the fuel pressure test port. See if the fitting is broken off of the steel tube and check the sensor. If that is not the problem, then you will need to test further. Other possibilities are the EGR module which is the vacuum switch that actuatest the EGR valve. It typically throws a different code in addition to the 32 though.
Get a manual and just follow the test instructions. It should be a simple one to diagnose.
Get a manual and just follow the test instructions. It should be a simple one to diagnose.
Pro
Joined: Mar 2008
Posts: 579
Likes: 2
From: High Bridge New Jersey
How
I've sorted out my SIR code 16 & SRC code 42, now on to my SES code 32.
I have a '90 coupe L98, all stock except previous owner installed what appears to be MAMO cat back exhaust with crossover (2.25" pipes).
I'm getting an intermittant code 32 (EGR) and wondering if the reduction in backpressure due to the cat back exhaust could be causing it? I smogged the car (Calif car) a month ago and all emissions were a fraction of the allowables both at idle & 2500 RPM tests. Just wanted to check if this exhaust could throw this code before I go through the diagnostic tree. Seems to happen at medium to heavy throttle, but only intermittingly.
Thanks for any input.
I have a '90 coupe L98, all stock except previous owner installed what appears to be MAMO cat back exhaust with crossover (2.25" pipes).
I'm getting an intermittant code 32 (EGR) and wondering if the reduction in backpressure due to the cat back exhaust could be causing it? I smogged the car (Calif car) a month ago and all emissions were a fraction of the allowables both at idle & 2500 RPM tests. Just wanted to check if this exhaust could throw this code before I go through the diagnostic tree. Seems to happen at medium to heavy throttle, but only intermittingly.
Thanks for any input.
Racer
Joined: Jan 2007
Posts: 274
Likes: 0
From: Muskogee OK
The '90 doesn't have an EGR heat sensor, so you can rule that out.
You will have a Positive Pressure EGR valve which "can" be affected by a lack of exhaust back pressure, especially on modified exhausts. Google positive pressure egr for the writeup.
Hopefully, your testing doesn't show that the EGR Solenoid is defective. They are extinct unless you find one in a boneyard.
You will have a Positive Pressure EGR valve which "can" be affected by a lack of exhaust back pressure, especially on modified exhausts. Google positive pressure egr for the writeup.
Hopefully, your testing doesn't show that the EGR Solenoid is defective. They are extinct unless you find one in a boneyard.
Safety Car
Joined: Jan 2004
Posts: 3,783
Likes: 15
From: Northern California
As long as the exhaust system is all intact (pre cats and main cat) the aftermarket catback system should'nt cause the lack of backpressure for the EGR to operate.
I have a Corsa catback system and had a code 32 several months after installing it. I checked everything that the members here suggested and everything checked out fine. Every night while driving home from work, the SES light would come on 5 minutes into the drive.
I finally decided to just change the EGR valve and the code 32 dissappeared forever!
This is on my California "91" Vette which passed the emissions test with flying colors.
I have a Corsa catback system and had a code 32 several months after installing it. I checked everything that the members here suggested and everything checked out fine. Every night while driving home from work, the SES light would come on 5 minutes into the drive.
I finally decided to just change the EGR valve and the code 32 dissappeared forever!
This is on my California "91" Vette which passed the emissions test with flying colors.
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