Question about 2002 Isuzu Trooper

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EGR valve is being cleaned due to "Check Engine"

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Marvin

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CLEANING THE VALVE WILL NOT RESOLVE THE ISSUE, IT SHOULD BE REPLACED.

Posted on Dec 16, 2010

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In some cases cleaning egr valve temprorarily solves the issue.but next time check angine appears, replace it with a new one..

Posted on Dec 30, 2012

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1 Answer

Check engine light comes code p1401


Hi Abe, I'm glad to help!

P1401 is an EGR fault code: Differential Pressure Feedback EGR Circuit High Input. This can be caused by several things. EGR Valve is bad, Flow through the valve is restricted due to carbon build-up. Electrical connector OR wiring is damaged somewhere. Check the wiring and the connector at the EGR valve if no damage is found then replace the EGR valve and clean the port holes in the engine and the EGR tube that's running to the valve "IF IT HAS ONE". Clear the codes and drive it and see what happens. Hope this helps and have an awesome day Abe.

May 17, 2013 | Mercury Villager Cars & Trucks

2 Answers

CHECK ENGINE LIGHT ON.


remove the EGR valve and clean the carbon from the port it is connected to, they are known to get clogged up, you may also have a bad egr valve.

Oct 25, 2012 | 2000 Honda Accord

1 Answer

Sevice engine soon light comes on due to egr valve on my 1995 Chevy S-10


egr valves start to clog with carbon on the valve and cause -loss of power -hesitation-stalling -hard start -problems u may get lucky by unbolting it and cleaning the egr valve with a carb cleaner and checking the valve seat that it working when u remove it also check the spring [not broken or filled with carbon ]if the unit is unable to be cleaned or repaired replace an egr problem can leave u stuck

Jun 27, 2011 | 1995 Chevrolet S-10 CA Edition

1 Answer

1997 volvo 960, check engine light on with P0401. These motronic 4.4 do not have EGR, p0401 mean insufficient EGR flow. How do you fix this if there is no EGR?


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

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

Check it and send us your advance.

Mar 02, 2011 | 1997 Volvo 960

2 Answers

My 1997 gmc sonoma truck,it has a V6,4.3 liter V-Tec failed the MIL/Check Engine Light Test due to a Warning Lamp Failure. Due to a OBD Fault Code:P1406 manufacturer specific code


This code indicates a problem with the EGR valve's pintle position. The EGR Valve's pintle could just be stuck in which case the problem could be fixed by cleaning the EGR valve.

If the EGR valve is electronically controlled or cleaning the valve does not fix the problem, you will most likely have to replace the EGR Valve. i hope this helps

Feb 08, 2011 | GMC Sonoma Cars & Trucks

1 Answer

Egr trouble light


The EGR Valve and System - it's just three letters, but EGR can result in AGGravation.

Common in automobile emission systems since the early 1970s, the EGR (Exhaust Gas Recirculation) valve controls an engine's emission of smog-causing nitrous oxides, or NOx. Its job is to route a portion of the exhaust gases back into the intake manifold. That lowers combustion temperature to below 2,500 degrees Fahrenheit - the temperature at which NOx gases form.

EGR flow is controlled by the engine's computer, which opens or closes the valve as needed. The EGR system is, for the most part, in the "out of sight, out of mind" category, and typical doesn't require regular maintenance. But if it gets clogged with carbon deposits, you'll see your "check engine" light come on, and a code (perhaps P0401 or P0402 or P0403) will show that there is insufficient flow. That typically results from a vehicle being driven persistently on short trips that don't allow the engine to fully warm up. Flow problems also can be caused by carbon buildup due to failure to change the oil frequently enough.

A clogged EGR valve not only results in higher emissions, it can affect fuel economy and cause rough idling - even serious engine damage. Valves can usually be cleaned, but replacement is often recommended.

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

Jan 11, 2011 | 1999 Isuzu Trooper

1 Answer

Egr engine fault p0406 engine light on


egr flow sensor A curcuit high input---p0406. replace exhaust gas recirculation valve.--EGR-- or clean out carbon from engine side. if this does not work by cleaning, replace egr valve. also check all wire connections.

Oct 12, 2009 | 2005 Dodge Caravan

1 Answer

Check engine light on due to issue with EGR valve


You need to reset the cars cpu,..you can do this by unhooking the negative side of the battery for about 10 minuts,then if the light comes on again,run the obd2 reader again,because there is another problem.

Apr 13, 2009 | 2001 Isuzu Trooper

2 Answers

Check Engine Light Just Came On..


Remove the EGR valve and clean it out. It's probably carboned up really bad constricting the exhaust flow. Also remove the EGR tubes and clean them out as well. I use brake cleaner and keep spraying the pieces out until it's pretty clean and re-assemble.

Feb 04, 2009 | 2000 Ford Explorer

2 Answers

2000 mazda 626 engine light is on took it to the dealer found an egr valve problem they "fix" it light went on again took it back they check it found that the manifold was bad "fix" it...


do you see if the manifold was cracked? usually the problem is not just the egr valve it has a modulator it is either electronic or vacum controlled, now the right way to check or the first thing to do is if there is vacum at the valve and from there check to see if there is vacum at the egr valve only wheren you rev the engine aroun 2000 to 2500 rpm , but i suggest you not to rev the engine at this rate too long if the valve opens thne the next thing to do is remove the valve and makd sure that the egr port is not clogged up with carbon if it is plugged up you can just knock them off using a small screw driver or such and clean the passage with a wire brush and put the valve back always make sure that you put it back using a new egr valve gasket.

regarding the noise make sure that all other tubing that go from the exhaust manifold is not broken it is not just the muffler that is involved in the exhaust sys that keeps the noise down!!!

Nov 14, 2008 | 1999 Mazda 626

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