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How do I check the EGR valve? - 2002 Ford Expedition

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If you hold the pintle open with your finger, the truck should stall due to a big vacuum leak at idle. Also, you usually gert spark knock and a check engine light with a DTC code.

Why do you want to check?

Posted on Mar 30, 2011

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How to replace exhaust gas recirculation valve


Betty, Check the attached EGR links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
Exhaust Gas Recirculation Valve EGR Checking
Faulty EGR Valve Symptoms and EGR Valve Cleaning
EGR Valve Replacement Chevy Venture 3 4L Engine
Installing New EGR Valve


Mar 08, 2016 | 2003 Pontiac Aztek

2 Answers

I have a code P0401. What is this and how can I fix it?


P0401 - Exhaust Gas Recirculation Flow Insufficient Detected

Possible causes - Harness or connectors (EGR volume control valve circuit is open or shorted.)
- EGR volume control valve stuck closed
- EGR volume control solenoid valve
- Dead (Weak) battery
- EGR passage clogged
- Exhaust gas leaks Possible solution - Clean EGR Valve
- Repair EGR harness or connector
- Replaced EGR volume control solenoid valve
- Replaced EGR volume control valve

Mar 20, 2011 | 1998 Ford Taurus

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

1 Answer

401 egr system insufficient flow detected


If the EGR valve is electrically operated, check for its wiring connector to be connected and test the wiring for opens or shorts. If the wiring checks out, the EGR valve may be faulty.

If the EGR valve is vacuum operated, check that the vacuum diaphragm of the valve is intact and not leaking. If the diaphragm won't hold a vacuum, replace the EGR valve.

Feb 25, 2011 | 2000 Mazda MPV

1 Answer

I have a 2005 Dodge Dakota V8 4x4 My check engine light turned on. I took the truck to Autozone to have them hook up the machine and see what the problem was. It said I have a bad EGR Valve. I havent...


It can affect mileage, but it might not be the valve. EGR systems tends to get clogged by gunk. Take the valve off and see how dirty things are. If the system is clogged up, take apart as much as you can to clean it up. You can test the valve for operation with a good scanner (autozone doesn't do this--they just tell you the code). Here are instructions from autozone.com:

Linear EGR Valve Diagnosis
The linear EGR valve diagnosis procedure varies depending on the vehicle make and model year. Always follow the recommended procedure in the vehicle manufacturer's service manual. The scan tester may be used to diagnosis a linear EGR valve. The engine should be at normal operating temperature prior to EGR valve diagnosis. Since the linear EGR valve has an EVP sensor, the actual pintle position may be checked on the scan tester. The pintle position should not exceed 3% at idle speed. The scan tester may be operated to command a specific pintle position, such as 75%, and this commanded position should be achieved within two seconds. With the engine idling, select various pintle positions and check the actual pintle position. The pintle position should always be within 10% of the commanded position. When the linear EGR valve does not operate properly:
  • Check the fuse in the 12 V supply wire to the EGR valve.
  • Check for open circuits, grounds, and shorts in the wires connected from the EGR valve winding to the PCM.
  • Use a digital voltmeter to check for 5 v on the reference wire to the evp sensor.
  • Check for excessive resistance in the EVP sensor ground wire.
  • Leave the wiring harness connected to the valve, and remove the valve. Connect a digital voltmeter from the pintle position wire at the EGR valve to ground, and manually push the pintle upward. The voltmeter reading should change from approximately 1 V to 4.5 V.
436f9a1.jpg Linear EGR valve circuit. Courtesy of Chevrolet Motor Division-GMC.
If the EGR valve did not operate properly on the scan tester and tests 1 through 5 are satisfactory, replace the valve.

Here is what your valve looks like:
If you have more questions, please let me know.
a65cb7d.jpg

Oct 13, 2010 | 2005 Dodge Dakota

1 Answer

P0401 egr flow all senors,ports working properly at shop with ase


check ur egr valve -there are 3 parts to the egr --the dpfe[differential pressure feedback egr ]sensor//egr valve//actuator solenoid--++biggest problem with the egr valve is that it gets carboned up and the valve is stuck remove and clean the valve and tube with a carb cleaner and check valve for movement if faulty replace also check vacuum line and vacuum to egr unit

Feb 14, 2010 | 2001 Mitsubishi Eclipse

3 Answers

Location of EGR valve for 4.6 liter engine? how do you remove the EGR valve?


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EGR VALVE IS #2.

Please wait for second post to answer your second question....comes with a few pictures.

Nov 16, 2009 | 1992 Ford Crown Victoria

3 Answers

Need to no step bye step on how to replace a egr valve on a 1999 mazda protege


Hi,

HOW TO INSPECT EGR VALVE

Before attempting to troubleshoot or repair a suspected exhaust gas recirculation (EGR) system on a vehicle, the following conditions should be checked and be within specifications.
  • Engine is mechanically sound.
  • Injection system is operating properly.
  • Mechanical-vacuum advance is properly adjusted or the electronic advance system is operating properly.
If one or more of these conditions is faulty or operating incorrectly, perform the necessary tests and services to correct the problem before servicing the EGR system.

96cfe5b.jpg


Before attempting any tests of the EGR system, visually inspect the condition of all vacuum hoses for kinks, bends, cracks, and flexibility. Replace defective hoses as required. Check vacuum hose routing. (See the underhood decal or the manufacturer's service manual for correct routing.) Correct any misrouted hoses. If the emissions system if fitted with an exhaust-gas-recirculation valve position (EVP) sensor, the wires routed to it should also be checked.
If the EGR valve remains open at idle and low engine speed, the idle operation is rough and surging occurs at low speeds. When this problem is present, the engine may hesitate on low-speed acceleration or stall after deceleration or after a cold start. If the EGR valve does not open, engine detonation occurs. When a defect occurs in the EGR system, a diagnostic trouble code (DTC) is usually set in the powertrain control module (PCM) memory.

Cont....

Nov 07, 2009 | Mazda Protege Cars & Trucks

1 Answer

Check engine light on when check it insufficent EGR valve


yes the passages can be cleaned. They pass exhaust gas into the intake maniflod for reburning.

It could be the DPFE that controls the EGR too. Diff. Pressure Feedback EGR.

there is also a vacuum regulator valve and a solenoid too.

Please rate as fixya if this helps.

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Exhaust Gas Recirculation (EGR) Valve —3.0L (2V) Removal and Installation
  1. Disconnect the exhaust gas recirculation (EGR) valve (9D475).
    1. Disconnect the vacuum line.
    1. Disconnect EGR tube nut.
  1. Remove the EGR valve.
    • Remove the two bolts.
    • Remove and discard the gasket.
  1. NOTE: The sealing surfaces are soft metal.
    To install, reverse the removal procedure.
    • Carefully clean both sealing surfaces and install a new EGR valve gasket.
2d0d879.gif
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EGR Valve —3.0L (4V) Removal and Installation
  1. Remove the EGR valve (9D475).
    1. Disconnect the vacuum line.
    1. Disconnect the EGR tube.
    1. Remove the EGR valve and discard the gaskets.
e56a6e2.gif
  1. NOTE: The EGR valve sealing surfaces are soft metal.
    To install, reverse the removal procedure.
    • Carefully clean all sealing surfaces and install new EGR valve gaskets.

Apr 07, 2009 | 2000 Mercury Sable

1 Answer

How do you replace egr valve in a 2005 dodge caravan


REMOVAL - 2.4L The EGR valve and Electrical EGR Transducer are serviced as an assembly.
  1. Disconnect vacuum tube from electric EGR transducer. Inspect vacuum tube for damage.
  2. Remove electrical connector from solenoid.
  3. Remove EGR tube bolts from EGR valve.
  4. Remove EGR valve from cylinder head adaptor.
  5. Clean gasket surface and discard old gasket. Check for any signs of leakage or cracked surfaces. Repair or replace as necessary

INSTALLATION - 2.4L The EGR valve and Electrical EGR Transducer are serviced as an assembly.
  1. Assemble EGR valve with new gasket onto the cylinder head adaptor.
  2. Loose assemble the bolts from EGR valve to EGR tube.
  3. Loose assemble the bolts from EGR valve to cylinder head.
  4. Tighten bolts from EGR valve to cylinder head to 22.8 N·m (200 ±25 in. lbs.) torque.
  5. Tighten bolts from EGR valve to EGR tube to 11.9 N·m (105 ±20 in. lbs.) torque.
  6. Reconnect vacuum hose and electrical connector to electrical EGR transducer.

Aug 03, 2008 | 2007 Dodge Caravan SXT Minivan New Cars

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