Question about Infiniti Q45
Bad egr valve engine light on how much to fix
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Posted on Jan 02, 2017
SOURCE: Oldsmobile Alero EGR valve bad
yes you can do it yourself the egr valve is located on the exaust manifold closest to the fire wall unfortunately it has to be replace. it has an electronic lead to it and is vaccum operated to replace it is not a difficult task. the part can be purchased at a Napa or Oreilly's for alot less than at a dealership. just make sure your gasket surfaces are clean for replacement of new gaskets. if you have a code reader than can reset the code that is a benefit however if you do not you have to have a scan tool to reset the code. please rate the solution....thanks
Posted on Sep 19, 2008
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
SOURCE: bad egr valve
You can try cleaning it. Go to your local parts store and buy a can of brake cleaner. Remove the EGR valve and spray it into the valve and let it set 8 hours. Pour out the cleaner and clean the carbon off with a wire brush. Reinstall the valve and see if that helps. If not, you will have to buy a new one and it will not cost $316 if you DIY.
Posted on Oct 18, 2009
the egr system consists of control circuits as well as the egr valve itself. troubleshooting will have to be performed in order to pinpoint the fault. the valve may just need cleaning. there may be damage in the long run since the egr system introduces exhaust gas to the air intake to reduce combustion temperatures.
Posted on Apr 21, 2010
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Jun 02, 2012 | 2004 Infiniti Q45
Mar 29, 2012 | Infiniti Q45 Cars & Trucks
Mar 13, 2012 | Infiniti Cars & Trucks
Jan 15, 2011 | 2004 Infiniti Q45
Welcome to FIxYa.com
Description of codes are:
P01600 - Serial cable malfunction-- check connection,
Po115-Coolant sensor-indicates a open or short-circuit in the engine coolant temperature sensor circuit.
The P0401 code is Insufficient Flow Exhaust Gas Recirculation System.
The code is set when the engien computer detects less than the requested amount of EGR flow when the engine is hot and is under load.
What usually sets the code is an inoperative EGR valve, or a carbon clogged port under the EGR valve.
On your engine, the EGR valve is vacuum operated, and there is a little computer-controlled EGR solenodi valve in the vacuum hose that detemines how much vacuum the EGR valve gets. If this solenoid is bad, or there is a vacuum leak in one of the hoses, the EGR valve won't open when it should setting the code.
Since the dealer already cleaned the EGR valve tube, I would suspect your problem is likely due to a bad EGR solenoid valve or a leaky vacuum hose to the EGR valve.
Here is the EGR solenoid valve part number and list price:
P/N 3946038750 $40.59
I would clear the codes first and run engine for two min and re-check codes.
Write to me of the findings and we will go from there.
Regards, Lee Davidian
A Four Thumbs up ^^^^
is appreciated for answering your question.
Thank you, Lee
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