Forums Calendar Active Threads
Previous Thread
Next Thread
Print Thread
CEL codes 0401 0402 at the same time
#1593530 06/19/06 04:39 PM
Joined: Apr 2005
Posts: 82
Knoxville Tenessee
N
Nightwolf Offline OP
CEG\'er
OP Offline
Nightwolf
CEG\'er
N
Joined: Apr 2005
Posts: 82
Knoxville Tenessee
0401 and 0402 EGR insufficient and excessive at the same time i have heard this can mean the DPFE sensor. and what does DPFE stand for?

2000 T-red SVT #1049 of 2150
Re: CEL codes 0401 0402 at the same time
#1593531 06/19/06 05:15 PM
Joined: Feb 2004
Posts: 702
Somewhere Bleeding Mercon 5
P
Pale Horse Offline
Veteran CEG\'er
Offline
Pale Horse
Veteran CEG\'er
P
Joined: Feb 2004
Posts: 702
Somewhere Bleeding Mercon 5
Not Sure Without Looking It Up What It Stands For. But If You Go Down To Duratec Maintenance And Search For: "Tie Rod Ends" For Some Reason It Brings Up A Decent Thread About The DPFE Replacement And It's Location With Pics.

Also You Can Just Search "DPFE" And A Slew Of Previous Posts Will Pop Up That You Can Read Through And Make A Judgement As To What You Need To Do. Good Luck. Post With Any More Questions.

Oh And It Means: "Differential Pressure Feedback EGR"

CSVT E0 3L 14.5 @ 94mph, Stock Intake, Stock Exhaust minus Resonator, CEL, And Broken Pass. Side CV...Untuned.
Re: CEL codes 0401 0402 at the same time
#1593532 06/19/06 09:35 PM
Joined: Oct 2003
Posts: 5,143
Ypsilanti, Mi
A
AliasJerkâ?¢ Offline
Addicted CEG\'er
Offline
AliasJerkâ?¢
Addicted CEG\'er
A
Joined: Oct 2003
Posts: 5,143
Ypsilanti, Mi
Originally posted by Pale Horse:
Not Sure Without Looking It Up What It Stands For. But If You Go Down To Duratec Maintenance And Search For: "Tie Rod Ends" For Some Reason It Brings Up A Decent Thread About The DPFE Replacement And It's Location With Pics.

Also You Can Just Search "DPFE" And A Slew Of Previous Posts Will Pop Up That You Can Read Through And Make A Judgement As To What You Need To Do. Good Luck. Post With Any More Questions.

Oh And It Means: "Differential Pressure Feedback EGR"



I actually have a question... Why do you post with every first letter capitalized? Im not trying to be rude or anything, I just have always noticed that you have done that... any particular reason?

98 Corolla LE 1.8L DOHC 1ZZFE TEIN H.Tech Springs Tokico HP series Struts Short ram air intake Tsudo Axel Back Exhaust ... if a jelly fish stung me.. would you pee on the wound?
Re: CEL codes 0401 0402 at the same time
#1593533 06/20/06 12:29 AM
Joined: Jun 2005
Posts: 5,345
Virginia, USA
T
Tony2005 Offline
Addicted CEG\'er
Offline
Tony2005
Addicted CEG\'er
T
Joined: Jun 2005
Posts: 5,345
Virginia, USA
Originally posted by Nightwolf:
0401 and 0402 EGR insufficient and excessive at the same time i have heard this can mean the DPFE sensor. and what does DPFE stand for?



DPFE - Differential Pressure Feedback EGR (Exhaust Gas Recirculation). It is also known as the EGR Backpressure Transducer.

While it could be a faulty DPFE sensor, I would suggest testing it first. This thread has the how to for P0402.
http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=trouble&Number=1261255&page=2&view=collapsed&sb=5&o=31&fpart=1

In addition, from Ford CD manual, P0401.

Diagnostic Trouble Code (DTC) P0401 indicates that Continuous Memory Self-Test has detected insufficient EGR flow.

Possible causes:

-- EGR valve stuck closed or iced.

-- EGR valve diaphragm leaks.

-- EGR valve or flow path restricted.

-- EGR vacuum hose off, plugged or leaks.

-- VPWR circuit open to EGR Vacuum Regulator (EGR V.R.) solenoid.

-- EVR circuit to PCM open.

-- EVR circuit to PCM shorted to PWR.

-- Differential Pressure Feedback EGR (D.P.F. EGR) sensor pressure hoses both off.

-- D.P.F. EGR sensor pressure hoses reversed.

-- D.P.F. EGR sensor VREF circuit open.

-- Downstream pressure hose off.

-- Downstream pressure hose plugged.

-- Damaged orifice tube assembly.

-- Damaged EGR V.R. solenoid.

-- Damaged D.P.F. EGR sensor.

-- Damaged PCM.

Last edited by Tony2005; 06/20/06 12:35 AM.
"Always do the cheap and easy ones first." 1996 V6 ATX 96K miles

Moderated by  horseydug_dup1, Ray_dup1 

Link Copied to Clipboard
Forum Rules · Mark All Read Contact Us · Forum Help · Contour Enthusiasts Group Archives
Powered by UBB.threads™ PHP Forum Software 7.7.5