Almost Postal
Thread Starter
|
Junior User
Joined: Dec 2002
Posts: 53
Likes: 0
From: TN Foothills
Almost Postal
Around and around. This P401 EGR goes back several months. I am about to give up and go to the stealership and give up my life savings. Done everything including take it to 2 other shops with no cure, and 1 even said I needed to replace the computer. I said no....he is the only one who ever got anythning other than P401.
Does anyone have a suggestion OTHER THAN what I have already done??? Changed MAF, EGR, EGR solenoid, DPFE sensor, Removed and cleaned TB plenum, PCV and hose.....
And, could you Ford tech guys tell me what to expect when I take it to the dealer??
Thanks guys...I really like this Expy, but it is not dependable cause it will slowly shut down after leaving the cel on a while.
Does anyone have a suggestion OTHER THAN what I have already done??? Changed MAF, EGR, EGR solenoid, DPFE sensor, Removed and cleaned TB plenum, PCV and hose.....
And, could you Ford tech guys tell me what to expect when I take it to the dealer??
Thanks guys...I really like this Expy, but it is not dependable cause it will slowly shut down after leaving the cel on a while.
Post Fiend
Joined: Jun 2003
Posts: 5,983
Likes: 2
Are the DPFE hoses hook up to the correct tubes? One is bigger than the other and the tubes are sized accordingly. I'm sur eyou have, just checking to make sure.
The 401, that's an insufficient EGR flow? If so, the orifice in your EGR tube may be plugged. Can you remove it (from the EGR valve and exhaust manifold) and blow though it to see if it flows?
The 401, that's an insufficient EGR flow? If so, the orifice in your EGR tube may be plugged. Can you remove it (from the EGR valve and exhaust manifold) and blow though it to see if it flows?
Thread Starter
|
Junior User
Joined: Dec 2002
Posts: 53
Likes: 0
From: TN Foothills
Originally Posted by hkiefus
Are the DPFE hoses hook up to the correct tubes? One is bigger than the other and the tubes are sized accordingly. I'm sur eyou have, just checking to make sure.
The 401, that's an insufficient EGR flow? If so, the orifice in your EGR tube may be plugged. Can you remove it (from the EGR valve and exhaust manifold) and blow though it to see if it flows?
The 401, that's an insufficient EGR flow? If so, the orifice in your EGR tube may be plugged. Can you remove it (from the EGR valve and exhaust manifold) and blow though it to see if it flows?
Post Fiend
Joined: Jun 2003
Posts: 5,983
Likes: 2
No, I'm afraid the tube has to come off. I was chasing a similar but different problem a while back with my EGR backflowing. It was during that time that I learned that the orifice exists.
The same sensor that determines insufficient exhaust gas flow is the one used by the dignostic toos, so a direct examination is necessary.
The same sensor that determines insufficient exhaust gas flow is the one used by the dignostic toos, so a direct examination is necessary.
Thread Starter
|
Junior User
Joined: Dec 2002
Posts: 53
Likes: 0
From: TN Foothills
Originally Posted by hkiefus
No, I'm afraid the tube has to come off. I was chasing a similar but different problem a while back with my EGR backflowing. It was during that time that I learned that the orifice exists.
The same sensor that determines insufficient exhaust gas flow is the one used by the dignostic toos, so a direct examination is necessary.
The same sensor that determines insufficient exhaust gas flow is the one used by the dignostic toos, so a direct examination is necessary.
Hotshot
Joined: Aug 2002
Posts: 12,679
Likes: 15
From: BC, Canada
The dealer has scan tools capable of watching what the sensors see and what the outputs are doing with the engine running. They can also use the scan tool to command the EGR to open etc to see the response.
In our shop we charge a minimum of 1 hour to do any EEC diagnosis. If it takes longer than that it will cost more. You can tell the service advisor that you're willing to spend maybe 2 hours or so and if they haven't got it solved by then to stop and phone you.
Not sure what shops charge where you are but we're $82 an hour.
By far the most common cause of a P0401 is a bad DPFE. Did you use a Ford part or an aftermarket one?
In our shop we charge a minimum of 1 hour to do any EEC diagnosis. If it takes longer than that it will cost more. You can tell the service advisor that you're willing to spend maybe 2 hours or so and if they haven't got it solved by then to stop and phone you.
Not sure what shops charge where you are but we're $82 an hour.
By far the most common cause of a P0401 is a bad DPFE. Did you use a Ford part or an aftermarket one?
Senior User
Joined: Oct 2004
Posts: 418
Likes: 0
From: Richmond, TX
Just gonna throw this out there since you did not provide the first number in the code.
P0401 EGR Flow Insufficient Detected
P1401 DPFE Circuit High Input
You sure its the EGR code?
P0401 EGR Flow Insufficient Detected
P1401 DPFE Circuit High Input
You sure its the EGR code?
Trending Topics
Thread Starter
|
Junior User
Joined: Dec 2002
Posts: 53
Likes: 0
From: TN Foothills
Originally Posted by Racerguy
The dealer has scan tools capable of watching what the sensors see and what the outputs are doing with the engine running. They can also use the scan tool to command the EGR to open etc to see the response.
In our shop we charge a minimum of 1 hour to do any EEC diagnosis. If it takes longer than that it will cost more. You can tell the service advisor that you're willing to spend maybe 2 hours or so and if they haven't got it solved by then to stop and phone you.
Not sure what shops charge where you are but we're $82 an hour.
By far the most common cause of a P0401 is a bad DPFE. Did you use a Ford part or an aftermarket one?
In our shop we charge a minimum of 1 hour to do any EEC diagnosis. If it takes longer than that it will cost more. You can tell the service advisor that you're willing to spend maybe 2 hours or so and if they haven't got it solved by then to stop and phone you.
Not sure what shops charge where you are but we're $82 an hour.
By far the most common cause of a P0401 is a bad DPFE. Did you use a Ford part or an aftermarket one?
It occurs to me that OBDII can make everybody look bad on service.....
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Thread Starter
|
Junior User
Joined: Dec 2002
Posts: 53
Likes: 0
From: TN Foothills
Originally Posted by 01silvergt
Just gonna throw this out there since you did not provide the first number in the code.
P0401 EGR Flow Insufficient Detected
P1401 DPFE Circuit High Input
You sure its the EGR code?
P0401 EGR Flow Insufficient Detected
P1401 DPFE Circuit High Input
You sure its the EGR code?
Senior User
Joined: Oct 2004
Posts: 418
Likes: 0
From: Richmond, TX
Originally Posted by dan4147
Yes, EGR 0401. Been working on it off and on for 6 months, mostly because it is my 2nd vehicle for rec and work. Thanks for double checking me. Scan my 1st post and tell me if you know of something else to check. I have a cheap service DVD and this forum and have gone thru all the recommendations I could find.
Thread
Thread Starter
Forum
Replies
Last Post
Lugnut2008
Modular V8 (4.6L, 5.4L)
5
Nov 9, 2007 01:57 PM