2001 ford expedition 125k miles P0171 and p0174

10

Asked by Jul 13, 2014 at 04:24 AM about the 2001 Ford Expedition

Question type: Maintenance & Repair

Can't find the problem
•I replace the pcv hose
•Clean the mass air flow
•Replace the fuel filter (old one
wasn't bad)
•Sprayed the whole car with carb
cleanner and nothing
•Replace the throttle body gasket
The truck has no problems at all runs
good and smooth. One the check
engine light come one it uses more
fuel. Please help

9 Answers

39,205

Try replacing your PCV valve. If clogged, it may be gumming up your air filter with oil. If you get your PCV valve out, shake it. If you don't hear the ball bearing rattle, that means it's plugged and not working. Spray some carb clean through it, and shake it again. Usually that will free up the ball inside.

10

Thank for replying . I replace the pcv and the hose but the check engine light keep coming

39,205

Not a Ford guy but don't you have to try and clear the codes before they will go away? Have you tried disconnecting the negative battery cable for a few minutes to see if they will clear?

39,205

CAUSE 1: PCV Tube's rubber elbow (where it connects to the intake manifold) is torn open and causing a major vacuum leak. CAUSE 2: intake manifold gaskets that are leaking vacuum. CAUSE 3: fuel pump that's going BAD, but hasn't completely fried yet. CAUSE 4: A dirty (contaminated) MAF sensor. CAUSE 5: An exhaust leak right before the pre-catalytic converter oxygen sensors. CAUSE 6: BAD pre-catalytic converter oxygen sensor.

1 of 1 people found this helpful.
39,205

Forgot to mention...the above is a list of possibilities that I cut and pasted from an error code site. Hope it helps....

1 of 1 people found this helpful.
10

Thanks for all your help. I disconnect the negative battery often. I did replace the pcv hose and clean the mass air flow.

10

Does anyone live in arizona and know a mechanic that specialize on this?

Need to clear the codes with a diag reader tool. Disconnecting power won't do.

10

@drfunone just for further reference I have cleared codes both with a scan tool and by disconnecting the battery. the one step that is not mentioned is that you must disconnect both the positive and negative terminals and then touch them together. I prefer to use a jumper wire with alligator clips at both ends. leave them together for about 30 seconds and that has always cleared codes for me. the thing that most people forget is that the electrical system of a car has capacitors in various parts that may allow the system to remain charged for a period of time, by touching the terminals this wil eliminate the residual charge in the system.

1 of 1 people found this helpful.

Your Answer

Add photo

Related Questions

Expedition

Looking for a Used Expedition in your area?

CarGurus has 25,036 nationwide Expedition listings starting at $1,495.

ZIP:

Search Ford Expedition Questions

Ford Expedition Experts

#1 T_S_T
T_S_T
Reputation 1,910
#2 Larry Sturgis
Larry Sturgis
Reputation 1,330
#3 lightGear
lightGear
Reputation 1,010
View All

Related Models For Sale

Used Chevrolet Tahoe
588 Great Deals out of 32,673 listings starting at $1,500
Used Ford Explorer
1,004 Great Deals out of 70,331 listings starting at $997
Used Chevrolet Suburban
259 Great Deals out of 19,855 listings starting at $1,800
Used Lincoln Navigator
106 Great Deals out of 5,852 listings starting at $1,900
Used Ford F-150
2,067 Great Deals out of 208,410 listings starting at $290
Used GMC Yukon
399 Great Deals out of 20,215 listings starting at $2,495
Used GMC Yukon XL
205 Great Deals out of 12,709 listings starting at $2,000
Used Cadillac Escalade
209 Great Deals out of 11,028 listings starting at $3,000
Used Toyota Sequoia
132 Great Deals out of 5,463 listings starting at $2,795
Used Ford Excursion
8 Great Deals out of 785 listings starting at $4,250
Used Dodge Durango
298 Great Deals out of 21,328 listings starting at $1,500
Used Ford F-250 Super Duty
320 Great Deals out of 46,236 listings starting at $599

Used Cars For Sale

2017 Ford Expedition For Sale
25 Great Deals out of 14,844 listings starting at $26,995
2016 Ford Expedition For Sale
134 Great Deals out of 2,061 listings starting at $25,990
2015 Ford Expedition For Sale
17 Great Deals out of 654 listings starting at $19,995
2014 Ford Expedition For Sale
50 Great Deals out of 750 listings starting at $15,995

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.