Question about 1999 Nissan Maxima

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How do I remove 2000 maxima a33 egr tube? The Egr valve is fine; but the a33 tube is stopped up with carbon deposits.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: our 1995 nissan maxima started running really ruff,

http://www.autozone.com/az/cds/en_us/0900823d/80/1f/4e/28/0900823d801f4e28/repairInfoPages.htm
http://www.autozone.com/az/cds/en_us/0900823d/80/1f/4c/a2/0900823d801f4ca2/repairInfoPages.htm

http://forums.maxima.org/4th-generation-maxima-1995-1999/562989-egr-valve-issue.html

Posted on Jan 01, 2009

FoRdMaStEr
  • 51 Answers

SOURCE: no vacuum to egr valve

there is an EGR vacuum solenoid somwhere that controls on/off vacuum to actuate the valve. i am not to sure of the location, but follow the vacuum line back from the egr until you find a device that looks like an electrical check valve for vacuum. that is a possibilty. but then again i am a ford,chrysler guy and am just giving you an answer based on my understanding of the functuality of a vacuum egr system

Posted on Jan 15, 2009

Molson02536
  • 3854 Answers

SOURCE: How do I replace an egr valve on my 2000 Nissan

When you pop open the hood, look at the side of the engine on your right (driver's side). Underneath all the air intake duct that connects to your air filter is the EGR valve. It may  have a grey plastic top with an electrical connector attached to it (this top is about an inch and a half to two inches in diameter), a middle section below this that is made from a silvery metal with two rubber hoses plugged into it, and below this a bottom section with a metal pipe maybe three quarters of an inch in diameter connected to it. The metal pipe curves around and goes back behind the engine. There are two bolts that the valve is mounted on. To remove the valve, first you have to get a bunch of hoses and stuff out of the way to expose it, then disconnect the hoses and electrical connector from the valve, then disconnect the metal pipe connected to the base, then remove the two nuts on the two bolts. There is a gasket between the EGR valve and the engine which you will have to replace. It cost less than two dollars, good luck and hope this helps. WHen installing just do everything on revers. If you not sure if you can recall how the hoses goes back, take picture with your cell phone as reference. 

Posted on Jul 05, 2009

Mustgo
  • 2359 Answers

SOURCE: i am getting p0400 and p 0402 codes

Check the EGR air passage tube again.

You may miss some on the first pass.

====


Check for

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.


Cheers,

Mustgo

Posted on Dec 19, 2009

  • 25 Answers

SOURCE: EGR valve

pop the hood
take the air intake box off
look down under the throttle body
its sitting right under

Posted on May 18, 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
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Where is the egr valve on the V-6 Engine?


Not easy to see, but on drivers side of engine underneath intake manifold, so look for airflow intake tube, the larger air tube, and it is just below and to the firewall about middle of engine top to bottom. Hose comes out of it and two bolts hold it in, pretty easy to see once you know where it is located, but difficult to change. Sometimes just cleaning hose out will solve problem. Worth a try to buy EGR cleaner and spray and run a wire inside hose to loosen up carbon.
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1 Answer

96 sonoma running too rich with p1406 code


P1406 EGR Valve Pintle Position Circuit Fault
This code is usually caused by carbon buildup in the EGR valve. The carbon deposits prevent the valve from closing completely.

After removing the EGR valve, clean the pintle seat area of the valve and the corresponding passageway in the engine.

or simply replace the EGR valve.

Hope this helps!

Mar 07, 2012 | 1996 GMC Sonoma

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What does a PO401 means for a 1998 Mercury Sable


P0401 OBD-II Trouble Code - Insufficient EGR Flow

What does that mean?
EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor EGR (DPFE). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0401 code means that OBD detected an insufficient amount of EGR.

Symptoms
You may notice drivability problems such as pinging (a.k.a. pre-ignition knock) when the engine is under load or the vehicle is at higher speeds. There may also be other symptoms.

Causes
A code P0401 most likely means one or more of the following has happened:
* The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced
* There is a blockage in the EGR (tube), most likely carbon buildup
* The EGR valve is faulty
* The EGR valve may not be opening due to a lack of vaccuum

Possible Solutions
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)
* Replace the EGR valve

Hope this help to solve it; remember comment and rated this help. TY for using Fixya.

May 06, 2010 | 1998 Mercury Sable

1 Answer

How to fix code 401 on 2001 eclipse


A code P0401 most likely means one or more of the following has happened:

•The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced
•There is a blockage in the EGR (tube), most likely carbon buildup
•The EGR valve is faulty
•The EGR valve may not be opening due to a lack of vacuum

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 noticeable 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)
•Replace the EGR valve

Mar 31, 2010 | 2001 Mitsubishi Eclipse

2 Answers

The engine light comes on and a mechicanic plug in a computer thing and it said there is a problem with my EGR flow. what is the problem and how do I fix it.


check egr valve, remove it and check for carbon at engine where it mounts, or end of egr valve. check all lines and hoses to egr valve. when repaired. erase code with a obd2 scanner. egr sensor -A- high input.

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using an ohmmeter, you may be able to find the proper specs by googling "proper resistance for egr on 2000 saturn sl1"

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4 Answers

Emission inspection report list a code 401 as the problem.where should i start to correct the problem


Check for

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.


Cheers,

Mustgo

Sep 24, 2009 | 1996 Ford F150 Regular Cab

3 Answers

I am getting p0400 and p 0402 codes. checked the egr valve works fine. checked egr solenoid for resistance and it is fine. no lines are clogged. the code comes back. i am only getting 4 volts to the egr...


Hello and thank you for using Fixya!

I know you say there is nothing clogged. How ever, it's very common to get a Egr code P0400 when the egr tube is clogged. Remove just the Egr tube, the one with the egr temp sensor. Remove the EGR temp sensor and remove any carbon build up in the pipe. Then make sure the passeges in the intake are clear also.

If you have any more questions on this, please feel free to ask. Thanks Jay!

Jul 17, 2009 | 1997 Nissan Maxima

2 Answers

Code P1400 on a 1997 nissan maxima. help car wont pass inspection


P1400 on your vehicle is described as :Differential Pressure Feedback EGR Circuit Low Input You either need a new DPFE valve, or a new EGR valve. Both can be tested for functionality before replacing them both. EGR valve is more likely I think. Cleaning it may not improve its performance, but its worth a try. Also check the vacuum lines between the DPFE and EGR system. The EGR valve and DPFE are usually close together above the exhaust manifold/downpipe. you need service instructions to test these items, suggest you go to a garage really...

May 17, 2009 | 1997 Nissan Maxima

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