Question about 2003 Ford Explorer Sport

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Check engine light codes, p0171, p0174. forde explorer 2003 sport

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  • lperez Jun 30, 2008

    thanks, i didn't think the answer was coming so soon, thanks again

  • lperez Jul 02, 2008

    Perfect! once a cleaned the sensor the check engine turn off. thanks

  • rpatsches Jul 12, 2008

    I have a 2001 Ford Exployer Sport we replaced the MAF sensor, drove it 60 miles check engine light came on, went to auto zone, got a reading of P171 and 174 autozone cleared the code with computer next day light came on again. suggestions? vehicle runs good no hesitation, suggestions?

  • Rev. Carl Wyant Sep 03, 2008

    I get codes: po171,po174 and po401 on a 98 mercury sable. Is 401 causing the other 2 or vice versa ?.

  • robert Nov 29, 2008

    I changed the air filter on my 2003 Ford Explorer sport Trac, cleaned the MAF, cleaned the injectors, checked for air / vacuum leaks... PO171 code continues to show its face... What else???

  • Anonymous Mar 16, 2014

    p0171 code and p0174

  • Anonymous Mar 16, 2014

    it have check engineon

  • Anonymous Mar 22, 2014

    car runs fine just as service engine soon code p0171 and p0174p/d

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This fords have very comun problems with maf sensors geting contaminated, if you have not or can hear any vacium leaks, the problem is goin to be a conataminated mas air flow snsor (maf)
allow the engine to cold down for at least 15minutes and the remove the air filter hosing and inside has to have a sensor, clean the two liitle resistors inside with brake or carburetor cleaner, allow it to dry and reinstall it.
if this inf help please mark it as fixya ranking after you try what i said

Posted on Jun 30, 2008

  • fernando arevalo Jul 10, 2008

    you are very welcome sorry for the delay but i been so busy with my customers

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The po171 code is more than likely a lazy oxygen sensor on the drivers side of veh it will be the upstream sensor as there are 2 sensors on each side of the engines exaust upstream being the first one inline eg farthest from muffler as fpr the po174 its the other side oxygen sensor eg passenger side upstream as well these sensors become slow in response time causing intermitent codes before changing these sensors try using highest octane fuel for the next 3 fill ups and change oil if u see no change in intermitent codes then go to local parts store and purchase 2 oxygen sensors both upstream and replace both
good luck

Posted on Jun 30, 2008

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  • 65 Answers

SOURCE: my check engine light came

This means both banks have a lean condition. Most likely if you have a 4.0 SOHC motor your upper intake is sucking in air at the orings at the bottom of the intake. These are really bad about when they are cold in the morning the shrink and let air get by and after the engine warms up the orings soften and seal off.

Posted on Apr 29, 2011

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2 Answers

Why do you get code p0171,p0174/


Code 171 means the fuel mixture is too lean on bank one and code 174 is the same thing for bank two. So I doubt the O2 sensors are faulty. Chances are you have a fuel problem, maybe low fuel pressure.

Aug 04, 2014 | 2003 Ford Explorer Sport XLT

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What are the probable causes of DTCs P0171, P0174, and P0455?


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Sep 27, 2013 | 1999 Ford Explorer

1 Answer

My check engine light came on and machine gave me the codes p0171 and p0174 what do they mean? on a 99 ford explorer sport.


This means both banks have a lean condition. Most likely if you have a 4.0 SOHC motor your upper intake is sucking in air at the orings at the bottom of the intake. These are really bad about when they are cold in the morning the shrink and let air get by and after the engine warms up the orings soften and seal off.

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1 Answer

2003 Ford Expd. running rough @ idle -


There could be many issues. These codes read your engine is running too lean. Check : all your vacuum hoses for leaks, PCV valve and hose, MAF sensor. This may require an experienced technician to figure this out. Hopefully I help'd!!

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1 Answer

Ford windstar check engine light comes on after stopping when starting to get moving again shows p0171 & p0174 codes why??


P0171 indicates a lean condition. The most common cause of this is a defective mass air flow sensor. Also check if any vacuum leaks. P0174 OBD-II Trouble Code


Technical Description

System Too Lean (Bank 2)


What does that mean?

Basically this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exhaust.

Note: This DTC is very similar to P0171, and in fact your vehicle may show both codes at the same time.

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Thanks.


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1 Answer

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Hello,
Very common concern with the Explorer, Explorer Sport Trac and Ranger with the 4.0l SOHC engine! The upper and lower intake manifold gaskets fail, causing vacuum leaks..It can be Extremely difficult to detect these leaks, because they only leak intermittently (usually in the AM after a cold soak)... As the engine warms up they seal back up! Sometimes the vehicle will idle rough, surge or stall after initial start up, then the symptoms will clear after it gets to operating temperature... Usually there will be no driveability symptoms at all, except the engine light coming on and setting lean codes.. The gaskets have been redesigned to correct this concern..


Bill Andrade Ford Master Technician/ASE Master Technician

Sep 22, 2009 | 2003 Ford Explorer Sport Trac

5 Answers

Code #P0171 & code #P0174


Look, man here is the deal:
code p0174 - refer to the front cylinder bank
code p0171 - refer to the rear cylinder bank

Jun 22, 2008 | 2002 Ford Explorer Sport

1 Answer

Code #P0171 & code #P0174


The most common problem on a Ford with these codes is deteriorated PCV hoses. Check the hoses from the PCV valve to the intake manifold. Pay special attention to the rubber elbows. They often crack on the inside curve and the crack is hard to see.

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