2001 ford expedition 125k miles P0171 and p0174

Mikeq89
0

Asked by Mikeq89 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

8 Answers

Reelin68
7,900

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.

Mikeq89
0

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

Reelin68
7,900

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?

Reelin68
7,900

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 out of 1 people think this is helpful.
Reelin68
7,900

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

1 out of 1 people think this is helpful.
Mikeq89
0

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

Mikeq89
0

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

drfunone
0

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

Your Answer

Add photo

Related Questions

  • P0171 and p0174 2 answers

    Hi I can't seem to find the problem I did the flowing:

    2001 Ford Expedition Eddie Bauer

    -

    Maintenance & Repair

  • 01 expy 5.4 p0171 p0301 runs rough 6 answers

    Last week our 2001 expedition started running rough during a rain storm. We took it home and parked it for a couple days to let it dry out. Still ran rough after drying but now had a check engine l...

    2001 Ford Expedition XLT 4WD

    -

    Maintenance & Repair

  • Does my 2001 Windstar have both upstream and downstream o2 sensors? 3 answers

    I have cleaned the EGR valve, still get vacuum at the EGR solenoid, threw p0171 and p0174.

    2001 Ford Windstar SEL

    -

    Maintenance & Repair

  • P0171, P0174 check engine codes - possible electrical problem? 21 answers

    I have a 1999 Ford Windstar 3.8L with the check engine light on and reading codes p0171 & p0174. after a bachelors degree worth of research I have taken many steps to troubleshoot and fix the pro...

    1999 Ford Windstar 3 Dr STD Passenger Van

    -

    Maintenance & Repair

Expedition
Looking for a Used Expedition in your area?
CarGurus has 14,019 nationwide Expedition listings starting at $1,197.
ZIP:

Search Ford Expedition Questions

Ford Expedition Experts

#1 lightGear
lightGear
Reputation 770
#2 kbro
kbro
Reputation 530
#3 oldtimer37
oldtimer37
Reputation 390
View All

Related Models For Sale

Used Toyota Sequoia"
76 Great Deals out of 3,601 listings starting at $3,583
Used Chevrolet Tahoe"
509 Great Deals out of 18,605 listings starting at $1,750

Used Cars For Sale

2015 Ford Expedition For Sale
3,796 listings starting at $33,990
2014 Ford Expedition For Sale
33 Great Deals out of 1,670 listings starting at $24,950
2013 Ford Expedition For Sale
27 Great Deals out of 531 listings starting at $25,888
2012 Ford Expedition For Sale
37 Great Deals out of 688 listings starting at $14,997
2011 Ford Expedition For Sale
42 Great Deals out of 798 listings starting at $14,995