ERG Valve
ERG Valve
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Joined: Jan 2004
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From: St Louis
EGR valves rarely fail. Must have been another AutoZone (mis)diagnosis...
The DPFE sensor is connected to the twho small hoses/lines that branch off the EGR tube.
P0401 codes are almost always due to either clogged ports or a faulty DPFE sensor.
Steve
The DPFE sensor is connected to the twho small hoses/lines that branch off the EGR tube.
P0401 codes are almost always due to either clogged ports or a faulty DPFE sensor.
Steve
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What is this DPFE part really called? I have the same problem and "DPFE" does not show up in their computers so they don't know what it is. Is this the same thing as an "EGR Pressure Feedback Sensor?" Am I correct in assuming this is not a "EGR Valve Position Sensor?" None of these parts are cheap enough that I want to take a chance at getting the wrong thing.
Last edited by zuikoman; Jul 26, 2006 at 12:58 PM.
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Joined: Jan 2005
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From: New Bern, NC
Originally Posted by zuikoman
What is this DPFE part really called? I have the same problem and "DPFE" does not show up in their computers so they don't know what it is. Is this the same thing as an "EGR Pressure Feedback Sensor?" Am I correct in assuming this is not a "EGR Valve Position Sensor?" None of these parts are cheap enough that I want to take a chance at getting the wrong thing.
Oh, its real name: Differential Pressure Feedback EGR
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EGR Pressure Feedback Sensor is the cheap one to get... I guess I'll go with that. That one is about 30 bucks: AIRTEX 5S2040. The EGR Valve Position Sensor is about 55-60 bucks and comes in Standard Motor Products and AC Delco. I haven't been able to find a picture of the 5S2040 to compare to the others. Hopefully they are the same thing.
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From: St Louis
There are two different physical styles of DPFE sensors that are not interchangeable.
Specific application is by year and engine model.
The older style is rectangular, is mounted to an engine component, typically the intake, and is connected to the EGR sample tube by by two rubber hoses.
The newer style sensor plugs directly onto the two metal EGR sample tubes.
WARNING! If you replace this sensor without testing for EGR flow first and still get the P0401 code, I will say "I told you so!". Test the EGR valve and the ports first. Failure to do so may result in your wasting even more of your time and money. Diagnostic instructions have been posted dozens of times...
Steve
Specific application is by year and engine model.
The older style is rectangular, is mounted to an engine component, typically the intake, and is connected to the EGR sample tube by by two rubber hoses.
The newer style sensor plugs directly onto the two metal EGR sample tubes.
WARNING! If you replace this sensor without testing for EGR flow first and still get the P0401 code, I will say "I told you so!". Test the EGR valve and the ports first. Failure to do so may result in your wasting even more of your time and money. Diagnostic instructions have been posted dozens of times...
Steve
Last edited by projectSHO89; Jul 28, 2006 at 07:10 AM.
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Originally Posted by projectSHO89
WARNING! If you replace this sensor without testing for EGR flow first and still get the P0401 code, I will say "I told you so!". Test the EGR valve and the ports first. Failure to do so may result in your wasting even more of your time and money. Diagnostic instructions have been posted dozens of times...
Senior User
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Originally Posted by projectSHO89
There are two different physical styles of DPFE sensors that are not interchangeable.
Specific application is by year and engine model.
Specific application is by year and engine model.
.
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Joined: Apr 2004
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Try this, it may help
I just spent a couple of days figuring my P0401 code out. I learned more than I wanted to know about this system. I have taken some photos and put together a slide show about how I troubleshot my system, this may help others. I am not a certified Auto Mechanic, nor do I work for Ford, etc. If I made a mistake, please let me know and I will correct.
http://home.coastalnow.net/~a64armt...0401/Slide1.JPG
http://home.coastalnow.net/~a64armt...0401/Slide2.JPG
http://home.coastalnow.net/~a64armt...0401/Slide3.JPG
http://home.coastalnow.net/~a64armt...0401/Slide4.JPG
http://home.coastalnow.net/~a64armt...0401/Slide5.JPG
http://home.coastalnow.net/~a64armt...0401/Slide1.JPG
http://home.coastalnow.net/~a64armt...0401/Slide2.JPG
http://home.coastalnow.net/~a64armt...0401/Slide3.JPG
http://home.coastalnow.net/~a64armt...0401/Slide4.JPG
http://home.coastalnow.net/~a64armt...0401/Slide5.JPG
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