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2004 - 2008 F150 2004, 2005, 2006, 2007 and 2008 Ford F150's with 5.4 V8, 4.6 V8 or 4.2 V6 engine
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  #16  
Old 11-05-2005, 08:22 AM
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Quote:
Originally Posted by jdwheels
DPFE sensor? I am slow, what is that?
DPFE = Differential Pressure Feedback Exhaust (sensor)
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2004 F150 Super Cab 5.4L XLT 4x4, 6.5' box, 3.55 LS, Flint int., Oxford White ext.

1990 Mustang LX 5.0 Hatchback Black/Black 68k miles -original owner
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  #17  
Old 11-05-2005, 04:03 PM
Blue Bonnet Blue Bonnet is offline
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if the code is p0401 replace the dpfe sensor
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  #18  
Old 11-07-2005, 09:00 AM
davenpt davenpt is offline
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thanks for all the info, guys ( or gals). i did end up changing the EGR valve and the sensor, and the light still came back on. i will try the suggestions in order of simplicity, and see what happens. i still only have 33K miles on the truck. seems to run fine. so i don't know if whatever is causing the light to be on, is hurting anything or not. does anyone know if it might be bad to drive while the light is on?
thanks again for taking time everyone...
dave
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  #19  
Old 11-07-2005, 09:04 AM
chrisindallas chrisindallas is offline
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I still say try the fuel filter.. around 15 bucks and easy to change.. I changed my DPFE and also cleaned the ports and finially replaced the egr valve.. No luck.. Then somewhere on here someone suggested the fuel filter. IT WORKED! Just remember to use the fuel cutoff switch or else you will get a mouthfull of gas... (around 10 bucks in gas) lol
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  #20  
Old 11-07-2005, 09:14 AM
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Quote:
Originally Posted by chrisindallas
Then somewhere on here someone suggested the fuel filter. IT WORKED! Just remember to use the fuel cutoff switch or else you will get a mouthfull of gas... (around 10 bucks in gas) lol
Don't forget, you also need a special tool to release the fuel line connectors. If you don't have one already, any auto parts store should have one.
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2004 F150 Super Cab 5.4L XLT 4x4, 6.5' box, 3.55 LS, Flint int., Oxford White ext.

1990 Mustang LX 5.0 Hatchback Black/Black 68k miles -original owner
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  #21  
Old 11-07-2005, 10:35 AM
Blue Bonnet Blue Bonnet is offline
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you need someone to clear the codes form the pcm so the light will go out.it will not clear by itself. sometimes disconnecting the battery will work but not always.its not dangerous to drive around with the check engine light on but if something else happens with your emissions system you will not know there is something wrong because the light is still on. so have someone clear it and shut the light out.
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  #22  
Old 07-07-2014, 02:33 PM
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I know I am waking up a really old one here.....

But can someone tell me how a fuel filter can cause a P0401?
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Old 07-07-2014, 02:33 PM
 
 
 
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