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I've been bit by the CEL bug... GRRRRR!

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Old 05-22-2009
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I've been bit by the CEL bug... GRRRRR!

Ok.... I got code p0401- insufficient EGR flow... Also got lean bank codes po171 and po174... I replaced EGR valve, EGR Flow sensor and called everyone I knew. Still got a check engine light... My truck is an 02 4.0 with 42,000 miles... WTF!!!!! What else could it be? I have a cold air intake and the rest of the truck is stock... I'm taking back the sensor and EGR valve tomorrow and replacing original. Any Ideas?
 
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Old 05-22-2009
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My check engine light went off too and my scan gauge dosn't work any more! Damn can't check codes. Hope you can fix your problem.
 
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Old 05-22-2009
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Originally Posted by FRXLT View Post
My check engine light went off too and my scan gauge dosn't work any more! Damn can't check codes. Hope you can fix your problem.
I think I have a vacuum leak.... F it.... Ill take it to ford and let them turkeys fix it. LOL
 
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Old 05-22-2009
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Could your MAF be dirty? Are you using an oiled intake filter?
 
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Old 05-22-2009
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Did you reset your computer?
 
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Old 05-22-2009
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Originally Posted by FRXLT View Post
Could your MAF be dirty? Are you using an oiled intake filter?
ummmm its a little dry... uh oh
 
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Old 05-22-2009
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Originally Posted by Jimmeh View Post
Did you reset your computer?
yup... twice now... no actually 3 times... My poor CPU is getting Alzheimer's lol
 
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Old 05-22-2009
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Electronics cleaner. Should be about $5.

I don't think it's your MAF, or you would get that code first. But try cleaning it and other sensors anyway.
 
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Old 05-22-2009
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Originally Posted by Jimmeh View Post
Electronics cleaner. Should be about $5.

I don't think it's your MAF, or you would get that code first. But try cleaning it and other sensors anyway.
thanks dude. Im trying that tomorrow... Its getting Seafoamed with new plugs and an oil change too! woohoo!
 
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Old 05-23-2009
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Anyone? Sniff sniff....
 
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Old 05-23-2009
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on the right side of your intake, there is a vac line that runs from the back of the motor to right by the throttle body, the upper radiator hose rubs on this elbow and rubs through. get a can of carb clean when the motor is running, idling, and see if the rpm changes depending on where you spray. spray around that line or remove it and inspect it and see if there is a problem with it. this would cause your lean code but im not sure about your EGR code, could be the DPFE sensor if i had to guess
 

Last edited by Toreador4x4; 05-31-2009 at 05:42 PM.
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Old 05-23-2009
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Originally Posted by Toreador4x4 View Post
on the left side of your intake, there is a vac line that runs from the back of the motor to right by the throttle body, the upper radiator hose rubs on this elbow and rubs through. get a can of carb clean when the motor is running, idling, and see if the rpm changes depending on where you spray. spray around that line or remove it and inspect it and see if there is a problem with it. this would cause your lean code but probably not your EGR code, that is most likely the DPFE sensor if i had to guess
X2
 
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Old 05-23-2009
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I have done everything now... reset codes with scanguage... lets all hope and pray...
 
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Old 05-23-2009
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you need tojust buy a new truck and prerunner the **** out of it
 
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Old 05-23-2009
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happened 3 times to me. I dont know if your year has a DPFE sensor or not but i replaced that as well as the EGR and no light since
 
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Old 05-23-2009
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Originally Posted by jtslmn720 View Post
happened 3 times to me. I dont know if your year has a DPFE sensor or not but i replaced that as well as the EGR and no light since
did both... no luck.... seafoaming tonight..... then new plugs and vacuum lines...
 
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