Code EGR
Thread Starter
8th Gear
Joined: Jun 2009
Posts: 8
Likes: 0
From: Washington
Code EGR
So, my check engine light likes to come on only while on the freeway, after hitting 60mph after 10mins of driving. The code turned out to be the EGR, how serious is this? Is it as simple as replacing a sensor? My 'Vette has aftermarket exhaust on it if that helps.
Le Mans Master
Joined: May 2005
Posts: 5,214
Likes: 65
From: Queensland, AUSTRALIA
You need to get the Genuine GM service manual, go to the emissions and drivability section and find the DTC in question, which i believe is 32, and follow the steps it suggests in order to find out where your problem resides.
At a guess, i would say it may be the EGR vac solenoid, but you really need to go through the fault finding path as it appears in the manual to be sure, cause it could be traced back to a wiring fault, or even the ECM having some sort of issues (as highly unlikely as i think that last one will be...)
At a guess, i would say it may be the EGR vac solenoid, but you really need to go through the fault finding path as it appears in the manual to be sure, cause it could be traced back to a wiring fault, or even the ECM having some sort of issues (as highly unlikely as i think that last one will be...)
Instructor
Joined: Oct 2007
Posts: 151
Likes: 1
It makes sense that you only get the fault after you are driving on the highway becayse that is when the EGR is supposed to open. For some reason seems like yours is not. It could be either the EGR itself or, the EGR solenoid, or, the vacuum lines between the plenum, the EGR solenold, or, the EGR valve.
Good Luck
Good Luck
Thread Starter
8th Gear
Joined: Jun 2009
Posts: 8
Likes: 0
From: Washington
I will look through my service manual in the morning about the EGR. I'm going to attempt cleaning my fuel sending unit with the aide of my trusty assistant (the fiance). I've looked up at Ecklers and Rockauto the prices for EGR Valve and Solenoids, eh.
Safety Car
Joined: Jan 2004
Posts: 3,783
Likes: 15
From: Northern California
Same thing happenend on my "91" Vette.
Everything checked out OK, even the EGR valve opened and closed smoothly. I finally decided to just change the EGR valve for the heck of it and problem solved!
Everything checked out OK, even the EGR valve opened and closed smoothly. I finally decided to just change the EGR valve for the heck of it and problem solved!
Last edited by GKK; Jun 18, 2009 at 09:14 PM.
