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  #1  
Old 09-12-2007, 09:55 PM
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Default 2001 Explorer 6cyl, 4.O L trouble codes

Hi all,I have a 2001 Explorer Sport with a 6cyl/4.0L engine in it, i have been told it is what is called 2nd generation engine, because it replaced the original engine that was in these models. Anyways, my check engine light came on and i have recieved these codes, P0401, P0171, P0174. Any ideas on where and what i should be looking at to help solve them. Any and all help is greatly appreciated. Thank you in advance.
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  #2  
Old 09-13-2007, 07:21 AM
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Default RE: 2001 Explorer 6cyl, 4.O L trouble codes

I'd start by replacing the DPFE. This is a common code generator for these codes.





P0401
Exhaust Gas Recirculation Flow Insufficient Detected

P0171
System tooLean (Bank 1)

P0174
System too Lean (Bank 2)
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  #3  
Old 09-14-2007, 08:41 AM
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Default RE: 2001 Explorer 6cyl, 4.O L trouble codes

Ive been looking around online at the dpfe thingy, what is the difference between the one for $26.00 form autozone, and the one for about $72.00 from O'reilly's? That seems like a wide range in price for that thing. Is it worth it to spend the extra money on that part. Any ideas and help is appreciated. Thank you
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Old 09-14-2007, 03:22 PM
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Default RE: 2001 Explorer 6cyl, 4.O L trouble codes

Should be no difference except for the MFG of the unit and how much they want to charge you for it. I show Autozone listing the one for your vehicle for $48. You could cruise EBAY and pick one up for about $20-25. I just got one for my 2000 Taurus for $25 including shipping.
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2004 Freestar Limited 4.2 V6 w/Water Injection & Iridium plugs
2010 Lincoln MKZ AWD (Vacationing in Arizona)
2007 Focus SE (Just bought 9/29/2012 @ 59K miles)
1979 Gilson 32" 10HP Snowblower
2007 Generac 17.5Kw Generator w/33HP Twin-Cylinder engine
Farmhand 3-Cylinder air compressor

AMSOIL Lubricants and Filters in everything

"Have a good day, and a better one tomorrow"
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  #5  
Old 09-14-2007, 11:39 PM
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Default RE: 2001 Explorer 6cyl, 4.O L trouble codes

Well i replaced the dpfe sensor, and erased the codes out of the system, i went driving for a while. The CEL light came back on, but this time it was just for 0171 and 0174. The 0401 was gone. Any ideas of what to look at?!
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  #6  
Old 09-15-2007, 07:19 PM
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Default RE: 2001 Explorer 6cyl, 4.O L trouble codes

Look for a vacuum leak somewhere
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  #7  
Old 09-15-2007, 10:17 PM
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Default RE: 2001 Explorer 6cyl, 4.O L trouble codes

Yea, i found some older posts and some other sites that said for the 2 codes i have now to do 1 of several things. Look at the MAF sensor and possibly clean it if need be. Check the O2 sensor, one of those may be bad, and the vacuum leak. So i guess i will hunt around for those problems the next few days.
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Old 09-16-2007, 05:36 PM
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Default RE: 2001 Explorer 6cyl, 4.O L trouble codes

are there any particular areas to look at for the vacuum leak?!?!
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Old 01-11-2008, 11:12 PM
 
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Default RE: 2001 Explorer 6cyl, 4.O L trouble codes

I am getting the same codes (Lean) I was told to change the lower intake manifold gaskets. Have you found your problem?
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Old 01-11-2008, 11:12 PM
 
 
 
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04, 2001, 2004, code, codes, dpfe, engine, explorer, fault, ford, freestar, p0401, sensor, v6, van

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