Main IndexAuto Repair Home Search Posts SEARCH
POSTS
Who's Online WHO'S
ONLINE
Log in LOG
IN







2000 Expedition V8 Code P0401


  Email This Post



comnavguy
User

Jun 12, 2011, 3:56 PM

Post #1 of 5 (4325 views)
Shortcut
2000 Expedition V8 Code P0401 Sign In

2000 Ford Expedition. 4.6L V8 with 137,000 miles shows P0401 EGR flow insufficient.

I have replaced the EGR valve, reset the codes, driven the vehicle over 40 miles and all I/M monitors are OK and Code P0401 came back.

What else could cause that code to set?


Hammer Time
Ultimate Carjunky / Moderator


Jun 12, 2011, 5:07 PM

Post #2 of 5 (4321 views)
Shortcut
Re: 2000 Expedition V8 Code P0401 [In reply to] Sign In

It's going to be a bad DPFE sensor or a plugged up passage in the throttle body. The DPFE is most likely but try applying vacuum directly to the valve at idle to see if it tries to stall. If it does, the passage is good.




~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



comnavguy
User

Jun 14, 2011, 12:48 AM

Post #3 of 5 (4299 views)
Shortcut
Re: 2000 Expedition V8 Code P0401 [In reply to] Sign In

Thanks again and again for your help!

This particular Ford engine doesn't like water anywhere near the number 8 cylinder. Spraying the engine off with a low pressure hose caused misfire on 8.


Hammer Time
Ultimate Carjunky / Moderator


Jun 14, 2011, 5:56 AM

Post #4 of 5 (4294 views)
Shortcut
Re: 2000 Expedition V8 Code P0401 [In reply to] Sign In

No engine likes water but what does that have to do with a PO401?




~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Discretesignals
Veteran / Moderator


Jul 9, 2011, 1:48 PM

Post #5 of 5 (4168 views)
Shortcut
Re: 2000 Expedition V8 Code P0401 [In reply to] Sign In

More than likely the DPFE is the cause as HT stated. The aluminum ones would corrode inside from the moisture and acids in the exhaust. Also inspect the DPFE hoses. Make sure they aren't broken or plugged up with corrosion. If you have to replace the hoses, use hose specifically for the DPFE. Normal rubber hose will disintegrate with exhaust heat and gases. Don't get the REF and HI hoses switched and make sure you feel exhaust come out of the hoses when you rev the engine.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.




2000 Expedition V8 Code P0401


  Email This Post
 
 






Latest Forum Post
Video of noise: https://www.youtube.com/watch?v=Ynh1XsDzKCA thanks
Ok i have a 1999 grand am gt h.o. it has the 3.4ltr v6 just a few days ago it st...
2001 ford focus se 2.0 alternator wont charge had a break in the blue wire fixed...
Glad I found this site - now I just hope that you can help me. The first thing i...
I was driving for about 6 hours yesterday from CT to PA. Close to the end of my ...
1988 Year of vehicle GMC Make of vehicl...

Feed Button


Used Car Search
Used Car Price Ranges:
Under $5,000
$20,000
$35,000

$10,000
$25,000
$40,000
$15,000
$30,000
$45,000
Over $45,000
Search used Cars By Manufacturers:
Used Acura
Used Audi
Used BMW
Used Buick
Used Cadillac
Used Chevrolet
Used Chrysler
Used Dodge
Used FIAT
Used Ford
Used GMC

Used Honda
Used Hyundai
Used Infiniti
Used Jaguar
Used Jeep
Used Kia
Used Land Rover
Used Lexus
Used Lincoln
Used Mazda
Used Mercedes-Benz

Used MINI
Used Mitsubishi
Used Nissan
Used Porsche
Used Saab
Used Scion
Used Subaru
Used Suzuki
Used Toyota
Used Volkswagon
Used Volvo
2010 Honda Civic
$15,770
2004 Jeep
$8,991
2012 Mustang
$22,990
1997 Honda Cr-V
$4,490
2010 Toyota Prius
$17,496
2010 BMW 328
$26,980




Automotive Forum Categories
Automotive Repair
Auto Body Repair and Refinishing
AC Auto Repair Help Forum
Automotive Wiring and Electrical

Auto Insurance and Car Financing
Automotive World
Brake Systems
Car Stereo Repair Advice
Car Troubleshooting
Engine and Car Noises
Engine Fault Codes
Engine Troubleshooting
Exhaust System Repair

Steering and Suspension
Tricks of the Trade
General Discussions
Car Shows and Events
The Bargin Bin
Motor Vehicle Inspection
Car Care Tips
Traffic Ticket Help
Car Racing

Gasoline, Motor Oils, Concept Cars
Remote Control Cars and Vehicles
Truck Repair
Truck Repair Advice


Truck Engine Repair
Truck Suspension Repair
Motorcycle Repair
Motorcycle and ATV Repairs

Motorcycle Body Repair
Motorcycle Clutch Repair
Motorcycle Engine Repair
Motorcycle Seat Repair
Car Forum Posts - Sitemap


Search for (options) Privacy