Code 32
Thread Starter
Pro
Joined: Jun 2003
Posts: 559
Likes: 6
From: OKC OK
Code 32
Was driving around town last week and occasionally (twice) with the a/c on the ses lights. The car seemed to run absolutely no differently. At my next stop I shut her down, waited 30 secs and re-fired the engine...no ses light. I got home and put the scanner on her and found the egr code. So...what's the story? It doesn't always throw a code but when it does it's while the a/c is on. Hasn't thrown the code without the a/c. I'm looking at vacuum lines and egr solenoid and perhaps the egr valve itself. Looking for firsthand experience and suggestions. :cool:
Team Owner
Joined: Sep 2001
Posts: 62,067
Likes: 1,723
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: Code 32 (MtlSphere)
I ignore it, it doesnt affect how the car runs. EGR is shut off at WOT.
usually its the solenoid/switch, or a clogged pipe
usually its the solenoid/switch, or a clogged pipe
Burning Brakes
Joined: Jul 2002
Posts: 871
Likes: 0
From: Costa Mesa CA
Re: Code 32 (MtlSphere)
Code 32 is set in the ECM when the following conditions occur.
Coolant temp is above 176F.
EGR duty cycle demanded by the ECM is greater than 75%. (Bad)
TPS is less than half throttle but not idle.
Codes 21, 22, 23, 33 and 34 are not present.
All the above must exist for about 4 minutes. The SES usually comes on when you're steady cruisin' down the highway.
As you can see by the quotes from the book, the A/C has nothing to do with setting a code 32. Probably just a coincidence.
Also, from the book, "The most common cause of a code 32 is a faulty EGR switch". On your '85 (I had a red Z51 coupe) the EGR switch is located on the EGR valve itself under the plenum.
Hope this helps,
BIG JIM
Coolant temp is above 176F.
EGR duty cycle demanded by the ECM is greater than 75%. (Bad)
TPS is less than half throttle but not idle.
Codes 21, 22, 23, 33 and 34 are not present.
All the above must exist for about 4 minutes. The SES usually comes on when you're steady cruisin' down the highway.
As you can see by the quotes from the book, the A/C has nothing to do with setting a code 32. Probably just a coincidence.
Also, from the book, "The most common cause of a code 32 is a faulty EGR switch". On your '85 (I had a red Z51 coupe) the EGR switch is located on the EGR valve itself under the plenum.
Hope this helps,
BIG JIM
Thread Starter
Pro
Joined: Jun 2003
Posts: 559
Likes: 6
From: OKC OK
Re: Code 32 (BIG JIM 54)
Hiya Big J!
Thanks for your reply! Coolant temp was definitely above 176, I wouldn't know about the "EGR duty cycle", tps was definitely above idle and below half throttle each time, NO other codes were present.
I was cruising down the hiway both times. The code was thrown on my way to with the a/c on; I had the a/c off on the return trip each time and no code. That's why I wondered about a/c involvement.
Say...this car came outta Houston...suppose it's your old car? I mean...sure...there are other colors besides red...but who cares, right?
Found the egr switch on the rear of the intake, pass side, near the distributor. And a test procedure. Looks like I'll have something to tinker with this weekend! :cool:
Thanks for your reply! Coolant temp was definitely above 176, I wouldn't know about the "EGR duty cycle", tps was definitely above idle and below half throttle each time, NO other codes were present.
I was cruising down the hiway both times. The code was thrown on my way to with the a/c on; I had the a/c off on the return trip each time and no code. That's why I wondered about a/c involvement.
Say...this car came outta Houston...suppose it's your old car? I mean...sure...there are other colors besides red...but who cares, right?
Found the egr switch on the rear of the intake, pass side, near the distributor. And a test procedure. Looks like I'll have something to tinker with this weekend! :cool:
Safety Car
Joined: Feb 2002
Posts: 4,212
Likes: 10
From: Sun City West Az
Re: Code 32 (britvette)
I get this too, I read somewhere it can occur after fitting headers. I don't have no stinkin EGR., but do have headers.
Pro
Joined: Jul 2002
Posts: 729
Likes: 4
From: Yukon OK
Re: Code 32 (ittlfly)
On the 85 it is sensing the heat of the exhaust gas passing thru the valve after a command by the ECM. The ECM looks for two conditions:
1. Temp of sensor is hot when it should not be = EGR valve stuck open or leaking.
2. Temp of sensor is low when it should not be = EGR valve or relay bad. Stuck shut.
There ARE some tips out there on how to fool the ECM by wiring a diode from the output of the ECM back into the sensor output. But posting such info would be illegal. :yesnod:
1. Temp of sensor is hot when it should not be = EGR valve stuck open or leaking.
2. Temp of sensor is low when it should not be = EGR valve or relay bad. Stuck shut.
There ARE some tips out there on how to fool the ECM by wiring a diode from the output of the ECM back into the sensor output. But posting such info would be illegal. :yesnod:
Thread Starter
Pro
Joined: Jun 2003
Posts: 559
Likes: 6
From: OKC OK
Re: Code 32 (LaVidaLoca)
Okay...so...I'm lookin at the thing with a flashlight under the plenum and noticed the pigtail hanging off it. :confused: This weekend might be a good time to pull the intake and clean the top of the engine anyways...
Say LVL...how's about we get together at a Sonic on Route 66(Bethany or Yukon); I'll buy the Rt 44 cherry-limeades and you tell me all about this diode installation!? :cool:
Say LVL...how's about we get together at a Sonic on Route 66(Bethany or Yukon); I'll buy the Rt 44 cherry-limeades and you tell me all about this diode installation!? :cool:
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