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Can anyone point out where the egr ports are in the intake manifold on my 2003 Lincoln LS 3.9 V8? Getting P0401 code, I've already cleaned and tested the EGR Valve and replaced the egr Delta sensor.

2003 Lincoln LS 3.9 V8, intake manifold egr ports

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

emissionwiz
  • 75822 Answers

SOURCE: P0401. P0133, P1131- emmision test

Based on what the tech manuals say I would change the DPFE sensor for the EGR Valve, careful not to tear the special silicone rubber hoses that go to it from the exhaust, as a Ford dealer tech I saw these codes allot, and the DPFE sensor was almost always the issue or the hoses going to it.

Posted on Oct 16, 2008

  • 14 Answers

SOURCE: Code P0401 toyota Camry 3.0 v6

replace the vsv that has the vacuuum hose running from it to the egr valve

Posted on Jun 05, 2009

  • 3600 Answers

SOURCE: p0405 code.. changed egr valve and cleaned passage

The truck has two egr vales unless it's a 4 cylinder, then it has one, if it say your slipping and it's automatic change the filter and oil in the transmission and add Lucas transmission fluid conditioner to the tyranny. If the EGR valve is still giving a code then it means something in the egr system is not working, and one item that comes to mind is the purge canister valve on the evaporative control canister. To test find the purge valve and crimp it off with a pair of vise grips to close the vent then drive it. If it runs good then you have found your problem. Also low vacuum can cause the transmission not to shift correctly as it needs a vac. input for it to shift. Check your transmission fluid if it is brown and sort of smells like onions then the fluid is burnt and will cause all types of erratic behavior. And since I took the time to write this I would like to get some feed back as I am about to stop doing this.

Posted on Jul 21, 2009

kel1guy2002
  • 3740 Answers

SOURCE: How to clean EGR valve passages in 1993 Isuzu Trooper DOHC V6

You have to the EGR valve (sometimes the Intake manifold to EGR Vlalve line also). After you remove it take a drill bit the about 20 % smaller than the actual hole of the outlet side and rotate the drill bit with your hand to dig out the carbon. Aditionally the line coming from the intake manifold to the EGR valve will clog near the connection to the EGR valve. I use either a single piece of copper wire or the wire that you would use to tie ribar together to clean the line. When your done cleaning take a piece of vacuum line and connect it to the diaphram side and **** on it... then plug the line well with your thumb. Grasp the valve and blow thru it... Air should blow thru it freely. Remove your thumb from the vacuum line and try blowing again.. No air should pass thru the valve.
Then reinstall the valve and start the vehicle with the vacuum line disconnected (but blocked off) Use another piece of vacuum line connected to the diaphram again and **** on the line.. The vehicle should die or run really bad. If it does this then you cleaned it correctly.

Posted on Jan 20, 2010

redbeard00
  • 957 Answers

SOURCE: 2000 isuzu trooper: OBD-II Trouble Code: P0401 Insufficient EGR F

Your SUV is really giving you a hard time, lol. Sorry but I've had those days too.
I would try to check if you have blocked EGR passages. If ok check for restricted MAP sensor vacuum hose/passage or restricted exhaust. I know you replaced the CAT but if the muffler is blocked then there would still be a restriction. Also check the wiring and connection to the MAP sensor.

Posted on Apr 28, 2010

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03 honda civic 1.7L p0401 EGR code.


In fixing this code, it is quite common for people to just replace the EGR valve only to have the OBD code return. The EGR valve is not always the culprit. Use a vacuum pump and pull the EGR valve open while monitoring engine RPM's & DPFE voltage. There should be a noticable difference in RPM's with the EGR open Clean out the EGR valve and/or tubing to remove deposits Check the voltage at the DPFE, compare to specified values (refer to a repair manual for your specific model) Replace the DPFE sensor (with a good quality / OEM one)

Read more at: https://www.obd-codes.com/p0401
Copyright OBD-Codes.com

Sep 19, 2016 | 2003 Honda Civic

1 Answer

What is OBD Code P0401 2003 Lincoln


Insufficient EGR flow. Inspect all vaccum lines. If they all appear to be okay, I would replace your EGR valve. Relatively easy DIY job if you are careful not to hit other parts as access can be a little tight

May 06, 2014 | 2003 Lincoln LS

1 Answer

1995 Toyota Tercel code p0409


if you manually push up on the EGR valve and the engine doesn't stall and the passages are all cleaned out then the problem is the EGR valve.

Aug 18, 2017 | 1995 Toyota Tercel

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Where is the egr valve located on the 2003 lincoln ls v8 engine?


i believe that there should be an emission sticker under the hood that shows emission components and vacume hose routing.if you look at it it should show you the area the egr is located.usually located in the centre of the motor on the back side of the intake(towards the firewall side of the intake)

Aug 10, 2011 | 2003 Lincoln LS

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My 2003 chevy impal idles very high an i found 3 codes that are p0113,p0401,p1639,can anyone help me understand whats going on


p1639 is low a/c refrig. so that's not it. p0113 is low intake air temp. which is telling the computer its -38 f. This can cause the idle to be raised. and p0401 is EGR flow test failed.
Can you post what motor this has 3.8 liter or the 3.4 liter. This is something that we need to know.

Feb 14, 2011 | Chevrolet Impala Cars & Trucks

3 Answers

Whats does code P0401 mean ??


Hi,

P0401 means insuffient EGR flow:

EGR stands for Exhaust Gas Recirculation, which basically sends some of the exhaust back into the engine cylinder again. Your error means that there isn't enough of the exhaust gas making it back to the intake manifold.
The first thing I'd check is the tubes coming off of the EGR valve to make sure they aren't clogged or broken. Then I'd check the EGR valve itself and the throttle body. The problem is usually:
1.) Carbon buildup causing a clogging.
2.) Broken hoses.
3.) Broken Valve.

Best regards.

Oct 28, 2010 | 1996 Honda Accord

2 Answers

My check engine light and TCS light came on. Code


P0401: Isufficient Flow Detected in EGR system.
-clean the EGR port with the carburetor cleaner.
-clean the EGR passage inside the EGR valve with the caburetor cleaner.
Reset the light, if the light still coming back, then replace the EGR valve.

Apr 26, 2010 | 2000 Honda Accord

3 Answers

CODE P0401 COMEING UP


I had an OBD II 401 code and fixed it by cleaning out the EGR vacuum line in the intake manifold. I removed teh EGR Valve and the set screw below it. i used a rifle cleaning brush and one length of the rod. Then I replaced teh set screw. I started teh engind and let the vacuum **** some carb cleaner through the front port hole. when it was sucking good I replaced teh EGR valve and reset the codes. That fixed it.8_26_2012_9_39_13_pm.jpg

Feb 12, 2010 | 1999 Isuzu Rodeo

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P0401 Exhaust Gas Recirculation Flow Insufficient Detected replaced the EGR valve but "check engine light" comes back on with same P0401 code


check the metal line that comes off the exhaust and make sure it isnt plugged with carbon. also remove the egr and check the port and see it's clogged as well

Nov 17, 2009 | 1998 Oldsmobile Silhouette

1 Answer

Does anyone have engine schematics for a 2003 pontiac 3.1 V6? Or know of a site where I can find engine schematics? I have to replace an EGR Valve but don't know where it is located.


If you don't know where the EGR Valve is located, it is safe to assume that you did not properly diagnose your EGR system...how do you know the valve needs replacing?

If you are trying to fix a trouble code P0401 " Exhaust Gas Recirculation (EGR) Insufficient Flow" (This is a very common code with 3.1L GM Engines)
An EGR Valve replacement will most likely make you about $125 poorer than you were before and will not fix the problem.

Your EGR port into the intake manifold is most likely clogged up and needs to be cleaned out.

You will need a Throttle Body Gasket, an EGR Gasket, a can of ThrottleBody and Intake Cleaner, and a little antifreeze. (You will lose just a little when you remove the throttle body.)

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Remove the EGR Valve and the Throttle Body. Use a screw driver or pick to chip out the carbon buildup in the EGR port going into the intake manifold. You will probably have to work it from the intake side as well as the EGR side to get as much of the black carbon out as possible. Be careful not to let this stuff go down into the intake plenum - you will burn some valves if it gets in there. Then use the Throttle Body and Intake cleaner to finish the cleanup. (It helps to take a rag and stuff it into the intake manifold just past the EGR port to catch the gunk so it doesn't go down into the plenum...just don't forget to remove the rag before putting the Throttle Body back on)

Put everything back together and top-off your antifreeze and clear your computer codes. That should fix it.

Oct 27, 2009 | 2003 Pontiac Grand Prix

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