Question about Cars & Trucks
Engine light code shows egr problem. New egr and still a problem
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Posted on Jan 02, 2017
SOURCE: replace egr valve
Your 2001 Buick has digital linear EGR valve, and should be able to be replaced and the SES light cleared. When the conditions are correct, while driving, the computer will open the EGR valve and watch inputs from the valve itself, as well as the MAP sensor, and Oxygen sensor to verify proper operation of the EGR valve. There is no reprogramming required to change an EGR valve on a 2001 model year Buick. General Motors may have a re-flash available to correct an EGR issue, and sometimes they recommend this re-flash with a new part. I checked my sources for you and could not find any TSB (Technical Service Bulletins) that are associated with EGR valve replacement, or re-flashing of the computer to correct erroneous EGR codes. Regrettably, it sounds like you have an issue with your mechanic, and POSSIBLY a misdiagnosis. Hope this helps!
Posted on Feb 01, 2009
You could have a restriction in the egr ports. remove the valve. Plug the holes, start engine. 1 hole will be blowing out exhaust, the other will have large vacuum.
Posted on Mar 28, 2009
there are a couple of things, first make sure there are not restriction in the exhaust, i know the dealer has had to replace converters under warranty because of this problem, then theres a reflesh program for the computer due to this problem, and lastly,run with egr off make sure it clean of carbon,carbon gets stuck in pintle sets check eng lightbut carbon then blows by so when you remove egr you see nothing, well start with these good luck.
Posted on Nov 28, 2009
Error code will have to be cleared. The way that cars know when to turn on the check engine light is that there is a recurring error for "x" miles or time, as long as that error exists in it's memory most cars will continue displaying the check engine light.
Posted on Dec 02, 2009
SOURCE: EGR problem on 2001 Camry??
DID YOU CLEAN the EGR air passage tube?
Installed NEW gasket?
vacuum leaks on intake manifold,
the air tube between the air filter.
intake manifold vacuum hose.
clean throttle plate with Berryman carburator cleaner
SEE sample picture HERE
Also remove carbon built up behind the EGR valve and the EGR passage tube.
Vacuum leak WILL offset the intended 14.7 to 1 air fuel ratio.
More un-metered air (leaks) will lean out the fuel mixture.
Use small amount of Berryman carb clearer at potential air leak area will help you identify trouble spot.
At idle,just spray and listen for the RPM surge.
The in-rush of carb clearer will increase the RPM on the motor.
Record the problem spot(s) and address it later.
EGR carbon built up require 2+ hours to clean from start to finish.
You will need a new EGR base gasket before your start.
Locate and remove the EGR valve after the vehicle is cool down.
Carefully record the connector and vacuum line (for older vehicle) location by drawing an easily to follow diagram.
Remove the EGR valve.
Inspect the location of the carbon built-up inside the valve and the EGR passage tube.
SOAK these areas with WD-40 spary.
You will need a small screwdriver,cloth hanger and lot of newspaper and time to get this cleaning done right.
RE-SOAK the carbon and let it sit for over-night will also help.
One the last round,pass a shop vacuum of the EGR valve and the passage pipe.
Install the new EGR gasket and connectors.
Allow the vehicle to warm up outdoor to burn up any remaining WD-40.
Take it for a test drive.
Please rate my answer if it's useful to you.
Posted on Dec 19, 2009
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