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  #1  
Old 09-04-2007, 05:13 PM
 
Join Date: Dec 2006
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Default Code p0401

Hey guys, will today while driving check engine came, went straight to auto zone since i was gonna pass by anyway. Will got it checked out, and seems to be code p0401 egr system fault. Explanation the ecm has detected too little flowon the egr system. I have no idea were to start, any help would be greatly appreciated. Also got some probable cuases.
1-blocked passage on egr system
2-failed egr valve
3-egr solenoid faulty
4-failed egr pressure pensor(where applicable)
5-failed egr position sensor" "
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  #2  
Old 09-04-2007, 05:24 PM
 
Join Date: Aug 2007
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Default RE: Code p0401

remove the EGR valve and see if the hole in the intake is all carboned up. if it is, clean it out with a little wire brush/ pipe cleaner and some air intake cleaner, P0401 usually is insufficient flow. Thats the first place I would start. While you have the EGR out, see if it holds vaccum.
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  #3  
Old 09-05-2007, 01:19 PM
 
Join Date: Dec 2006
Posts: 46
Default RE: Code p0401

Can anyone pinpoints were this egr valve is located i have a 420a engine, and also the check engine light isnt on anymore is that normal?
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  #4  
Old 09-05-2007, 01:50 PM
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Default RE: Code p0401

its normal for codes like this to come and go
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Even tho My car looks great It will never be fast. Kinda like a hot girl that dosent give it up
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  #5  
Old 09-05-2007, 01:55 PM
 
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Default RE: Code p0401

omg great save me some money
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  #6  
Old 09-05-2007, 02:52 PM
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Default RE: Code p0401

I actually had no f-ing idea what that meant... learn something new every day : )
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  #7  
Old 09-06-2007, 07:14 AM
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Default RE: Code p0401

no i wasnt saying you dont have to fix it. Because if it came on obviously you do have something wrong. But i was just saying its normal for these codes to go on and off when you get the code. But you should still try and clean out the egr port on the intake manifold. Im not sure where its located on the 420a though
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ORIGINAL: pilsenblue
Even tho My car looks great It will never be fast. Kinda like a hot girl that dosent give it up
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  #8  
Old 09-06-2007, 02:13 PM
 
Join Date: Dec 2006
Posts: 46
Default RE: Code p0401

Ahgot my hopes up. Anyone have an idea were the erg valve is so i can clean it up a bit
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  #9  
Old 09-06-2007, 05:00 PM
 
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Default RE: Code p0401

Here is a pic from vfaq it is for a egr blockoff plate but it showed the location.
http://www.vfaq.com/mods/wayback/Bra...engine/egr.jpg
Click the image to open in full size.
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01, 2006, code, diamante, eclipse, eclpise, elcipse, fault, forums, galant, map, mitsubishi, montero, p0401, po401, sensor


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