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Old Phart
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Can someone tell me where the EGR valve and the DPFE is on the MKIII?

Do anyone have part numbers for those parts?
Nope, can't do it.

Not for lack of desire to help out, because they don't exist on the MkIII.

DPFE was only used on the Zetec engine for an EGR sensor, Zetec and early Duratec had EGR valves of different types but that was dropped when the Duratec got TiVCT (variable cams) for the latest GDI version.

SVT model didn't have EGR either for the same reason.
 

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That's good to know! I had pulled a P0402 code on my MKIII a few days ago but now, after Seafoam, the check engine light went off! I sent a report and found that it was back in running order! My problem is solved today!
 

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So what does the P0402 code mean on the MKIII? After filling up the tank yesterday somehow this morning driving up the bridge the check engine light came back on! Why? I hope someone could help me find out! The first time the code came up I had a full tank of gas! After getting down to half a tank the check engine light went off but with the help of Seafoam! Well, I haven't poured Seafoam in the tank yet. All help is appreciated and thanks in advance from a Focus Noob!
 

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Old Phart
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Old Phart
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44,595 Posts
Great - double check your actual code # and look at the old thread(s) for that code here (P0420 if it applies).
 

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i think there is some misinformation regarding the purge valve and the vent solenoid on the evap canister--a malfunction of one of these parts can cause the fuel tank to collapse which can cause all sorts of issues.

it would be nice to know which one specifically is responsible because i don't think the purge valve in the engine bay is the culprit most of the time. i believe i heard my fuel tank make a loud popping noise a few days ago and it looks a little deformed on the bottom. i'd hate to just replace the purge valve when i really need to drop the tank and replace the evap canister and vent solenoid.

more info on this would be great. and i've looked and not found much.
 

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Old Phart
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MkIII problems section has more information.

The issue was first brought up here, before it became known as a more common problem. Many are still doing it under warranty or looking for warranty coverage, so the references stay here and in that section.

While it doesn't seem reasonable to many, the existing purge valves in the engine compartment have proven to be a real issue with fuel tank deformation. With a full fix running in the couple grand region out of warranty, catching it early is a high priority.

Evap canister valve has not shown a tendency to fail in a manner to cause this issue.


Bottom line - purge valve code or unusually small fuel fill means check it out right away!
 

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Old Phart
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44,595 Posts
Regular gas can't cause an issue, unless an actual case of BAD fuel with contaminants.

Check codes in detail, exact numbers and status can hint at a lot. NEVER a solid diagnosis per se, how directly they point at an issue varies.
 

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Torretto!
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3,879 Posts
Bottom line - purge valve code or unusually small fuel fill means check it out right away!
Yes, or other problems with gas gaugse not accurate..it's a cheap fix, most people do get codes mentioned in the TSB before they get the more serious issues.
 

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Shell regular must be some horrible fuel. As for now the check engine light is off but I'm using 93 octane. I'll see if the check engine light comes on again when I get a full tank of gas.
 

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Focus Preacher
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3,412 Posts
Shell regular must be some horrible fuel. As for now the check engine light is off but I'm using 93 octane. I'll see if the check engine light comes on again when I get a full tank of gas.
Get the DTC , they are still there even if the check engine is not lit.

Might not be even fuel related.
 

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MkIII problems section has more information.

The issue was first brought up here, before it became known as a more common problem. Many are still doing it under warranty or looking for warranty coverage, so the references stay here and in that section.

While it doesn't seem reasonable to many, the existing purge valves in the engine compartment have proven to be a real issue with fuel tank deformation. With a full fix running in the couple grand region out of warranty, catching it early is a high priority.

Evap canister valve has not shown a tendency to fail in a manner to cause this issue.


Bottom line - purge valve code or unusually small fuel fill means check it out right away!
So is the replacement part being recommended a PRIORITY modification necessary to prevent this from happening? This is the first I've heard of it. Or would it be recommended to wait for the code to pop up and quickly perform the modification with the listed part after that?
 

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Focus Preacher
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So is this part being recommended as a PRIORITY to do modification to prevent this from happening? This is the first I've heard of it. Or is it recommended to wait for the code and quickly perform the modification with the listed part.
Might or might never happen... first original valve might be fine but then you replaced with a new and this one might give you trouble...


I'd says wait before starting to replace everything.

A lot of 2012 focus are still fine...including mine.
 
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Old Phart
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The point is NOT to wait if a CEL shows, as sykosis mentioned in another thread on this yesterday Ford tends to consider a deformed tank as a CUSTOMER failure to maintain the car, lack of timely response to the CEL.
 

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Focus Preacher
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The point is NOT to wait if a CEL shows, as sykosis mentioned in another thread on this yesterday Ford tends to consider a deformed tank as a CUSTOMER failure to maintain the car, lack of timely response to the CEL.
Thing is... there is no new revision of that valve yet (checked with dealer)...

New one does not guarantee it will not fail sooner.
 

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The point is NOT to wait if a CEL shows, as sykosis mentioned in another thread on this yesterday Ford tends to consider a deformed tank as a CUSTOMER failure to maintain the car, lack of timely response to the CEL.
My car never threw a CEL and after replacement of the valve I have tank, sending unit and pump damage. Will know to what extent when I get the new pump and sending unit in and drop the tank.

Sent from my XT1045 using Tapatalk
 

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Old Phart
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That has happened, first reports of this included nothing more than fuel gauge off as a warning.

Juicedz was asking about preventive Mods, don't know of anything that's a guarantee yet.
 
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