EGR code check engine light

10

Asked by Sfed11 Apr 22, 2017 at 11:08 AM about the 1998 Ford F-150 Lariat 4WD LB

Question type: Maintenance & Repair

I have a 98 f-150 4.6l 4wd. Have replaced egr, cleaned all areas of egr and
replaced sensor under egr. In addition replaced computer thinking one of the
banks was bad.
Trucks runs excellent  no rough idle or any other issues associated with an egr.
Could this be a witing issue. The shop I have taken my vehicle too has been
excellent trying to solve this issue but still have the issue and need an emission
test for my registration. Any help would be greatly appreciated, thanks

9 Answers

70,875

how many miles / hours do you have on it since your last repair ???

1 people found this helpful.
70,875

Code P0401 EGR insufficient flow". ??? takes up to 100 miles for the computer to sample enough times for it to determine it is ok and turn off the light. the DPFE was a common problem with Ford. Ford said this switch had been upgraded from the metal one to the plastic one. . VACUUM OK? HERES MORE INFO FOR YOU..GOOD LUCK...SHOULD BE A NICE FIX. the ports needs to be cleaned, AT THE EGR BASE 1.2 OR 3 HOLES HAVE TO BE CLEANED Cleaned it all up and put it back together. Problem solved. I replaced over $100 worth of parts and probably didn't have to change anything. So if somebody has had a cronic problem with the EGR code, clean up the trottle body

5 people found this helpful.
70,875

http://www.fordf150.net/howto/throttlebodyclean.php

2 people found this helpful.
10

Kelly and Tom thanks for the input. Truck has about 195k on it. The shop has cleaned everything associated with throttle and egr system. Vac is good as well. As for 100 miles for enough sampling light clicks on in only 5-10 miles after reset. The shop has driven with computer hooked up and can watch it just drop out, they reset same thing. This was why new computer but after replacing same issue. I notice my muffler is starting to split at the seems would that cause an issue sith the egr? Again appreciate the responses thus far hopefully this info can better help in a fix.

1 people found this helpful.
10

Anyone have any experience with this issue? All new egr system in essence, vac good, computer replaced. Code comes back on 5-10 miles after reset. Really need to have this issue resolved. Thanks for any advice

70,875

is the exhaust clogged ..pluged up..oh boy

1 people found this helpful.

the egr valve hooks to the plenum. There is one hole that comes from the egr valve and turns into two hole inside the plenum. Fun need to take the throttle Bobby of and the plenum. then clean it and open the holes. I had to clean mine and even stick nails in the hole to clean the gunk out of it.

Your Answer:

F-150

Looking for a Used F-150 in your area?

CarGurus has 15,725 nationwide F-150 listings starting at $1,712.

Postal Code:

CarGurus Experts

  • #1
    OJ
    Reputation
    42,450
  • #2
    Gene Arnett
    Reputation
    16,040
  • #3
    Rowefast
    Reputation
    15,840
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Silverado 1500
171 Great Deals out of 5,940 listings starting at $3,995
Used GMC Sierra 1500
128 Great Deals out of 6,854 listings starting at $3,975
Used Ford F-250 Super Duty
27 Great Deals out of 1,201 listings starting at $8,995
Used Toyota Tacoma
54 Great Deals out of 1,033 listings starting at $8,708
Used Dodge RAM 1500
4 Great Deals out of 80 listings starting at $4,000
Used Ford F-250
6 listings
Used Ford Ranger
15 Great Deals out of 1,439 listings starting at $2,888
Used Ford Mustang
49 Great Deals out of 1,268 listings starting at $4,995
Used Chevrolet Silverado 2500HD
20 Great Deals out of 1,146 listings starting at $8,999
Used Ford F-350 Super Duty
36 Great Deals out of 2,603 listings starting at $8,888
Used Ford Explorer
81 Great Deals out of 2,024 listings starting at $2,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.