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  #1  
Old 05-01-2003, 09:31 AM
meb1675 meb1675 is offline
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Unhappy P0401 EGR flow insufficient?

I have a 2000 Ford Ranger 3.0L engine, 2 wheel drive, with automatic transmission. Check engine light came on about 3 months ago. checked with scanner and P0401 EGR flow insufficient came up. cleared it and it came back. truck seems to be running fine. I didn't take autoshop as a kid, so i probably will need a little hand holding on this one.
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Old 05-01-2003, 10:06 AM
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P0401 EGR flow insufficient?

Hi meb1675, welcome to Ford Truck Enthusiasts!

I'm not an auto technician, but I've seen quite a few posts regarding the same problem and DTC that you are exeriencing. In almost all cases the culprit turned out to be a faulty DPFE sensor. (DPFE = Differential Pressure Feedback EGR). The sensor is easily relaceable and not that expensive (relatively speaking, of course).
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Old 05-01-2003, 11:23 AM
meb1675 meb1675 is offline
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P0401 EGR flow insufficient?

hey thanks for the reply. how would i test the sensor to see if it is bad or not?
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Old 05-01-2003, 12:43 PM
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P0401 EGR flow insufficient?

I'm not sure there is a test for the actual sensor itself. Haynes and Chilton's Manuals do not show one.

Here's a quick reminder: If/when you replace the DPFE sensor, make sure you disconnect the negative battery terminal for at least 15-20 minutes so that your PCM (computer) will reset and then adapt to the new sensor.

Good luck.
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Old 05-02-2003, 10:58 AM
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P0401 EGR flow insufficient?

fix for your problem it is the DPFE sensor
http://groups.msn.com/RangerBill/ran...to&PhotoID=677

if it the original part it is most likly shot
the new part is plastic and is about 75$ from the dealer or 50 or so from an aout parts store if they can figure out what it is
hope this helps
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Old 05-02-2003, 11:52 AM
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Thumbs up P0401 EGR flow insufficient?

Bone, they say a picture is worth a thousand words!

P.S. Welcome to FTE.
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Old 05-02-2003, 02:01 PM
meb1675 meb1675 is offline
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P0401 EGR flow insufficient?

thanks for all the help. i replaced the DPFE sensor and everything is back to normal.
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Old 05-05-2003, 08:39 PM
Fordman1962 Fordman1962 is offline
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Question P0401 EGR flow insufficient?

I'm going to change my DPFE sensor tomorrow on my 2000 Ranger XLT i have the P0401 Code.. I keep hearing different stories on how to clear the PCM from the P0401 code--I'm told that disconnecting the battery for 15 min WONT clear the code and some say it will.... Thanks for any help.......... MARK
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Old 05-05-2003, 08:45 PM
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P0401 EGR flow insufficient?

That will clear the codes, the Ford manuals list it as an alternate method.
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Old 05-05-2003, 08:55 PM
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P0401 EGR flow insufficient?

Ok thanks!! 1 More question--By disconnecting the battery--will i notice any strange things happening-Such as strange idles or crazy shifts untill the PCM resets? Just wondering?
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Old 05-05-2003, 09:16 PM
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P0401 EGR flow insufficient?

it may act funny for a minute or 2 untill the ECU "relearns" the setting but shouldn't run into anything major
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Old 05-05-2003, 09:17 PM
Fordman1962 Fordman1962 is offline
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Wink P0401 EGR flow insufficient?

Well thanks so much for all the info--You guys are a great help for sure!! Thanks so much!!!! Have a great night! MARK NY
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Old 05-06-2003, 06:59 PM
Fordman1962 Fordman1962 is offline
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P0401 EGR flow insufficient?

And cleared the code P0401... I have the old sensor here in front of me--Can i check it in anyway? Blow through it? Just wondering... Thanks so much............
MARK
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Old 05-06-2003, 07:33 PM
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P0401 EGR flow insufficient?

Not that I know, sorry.
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Old 05-06-2003, 08:15 PM
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P0401 EGR flow insufficient?

there really ain't a way to test it that i know of.. i just for fun took mine to work and opened it up to see what the big deal was... and all i could see was what looked like alot for carbor buildup ???
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Old 05-06-2003, 08:15 PM
 
 
 
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