Question about 1999 Ford Explorer

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My check engine light is on in my 99 ford explore. was told bank one and bank two are too lean. it sems to be drinking alot of gas. what could be the problem? im puttin gas in it like every other day. the first time the light came on it was that my mass air flow sensor needed to be cleaned but not replaced so i had that done and now i have this issue.

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USUALLY THAT MEANS YOUR OXYGEN SENSORS, BUT I WOULD DOUBLE CHECK I WOUNT LIKE TO SPEND OVER $130 ON THAT, THOSE MEASURE THE EMMISION CONSUMPTION AND ADJUST THE PROPER GAS NEEDED TO OPERATE ENGINES EMMISION PROPERLY. ALSO WHO EVER TOLD YOU THAT THEY ALSO SHOULD OF TOLD YOU ABOUT THE BLIND CODES THAT COME UP BUT ITS ACTUALLY SOMTHING ELSE LIKE A CLOGGED CATALIC CONVERTOR ALSO. NEED TO GET A SURE CODE SCAN OR THE ACTUAL CODE NUMBER. USUALLY ITS LIKE STARTS WITH A LETTER "P" FOLLOWED BY A 4 NUMBERS

Posted on Aug 04, 2010

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1 Answer

1998 ford explorer with a rich/lean code


I would check for a vacuum leak somewhere. Like the post for the pcv hoses and elbows to the intake manifold gaskets not sealing. Check with at scan tool the fuel trims to see how the engine is running. If the long term fuel trim is over 10 % then there is a vacuum leak. It is rare for a lean running bank and at the same time a rich running bank. The only thing that could be possible cause for that would be the mass air flow sensor or the hose to the throttle body is not sealing causing unwanted air to get passed the MAF. These engines have a problem when it is cold the manifold gaskets not sealing and then when the engine is warm to seal and the fuel trims be high when cold and then be normal after it warms up

Mar 22, 2014 | 1998 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.

Apr 29, 2011 | Ford Explorer Sport Cars & Trucks

1 Answer

My check engine light is on again and keeps sayin bank 1 and bank 2. The autozone said to replace both O2 sensors. So I did. Check engine light came back and now in the mornings when I start it, it starts...


I would start to look around For a new vehicle. Drinking antifreeze and running ruff? Sounds to me like u either A cracked a head or B have a bad head gasket. Now neither of these are easy jobs. Both cost alot even I u DIY. Not in just parts but machine shop charges. If it was me, and if it was paid off, I would look for a new vehicle and drive it till it dies completely which by the sound of it won't be long sorry for the bad news

Mar 24, 2011 | 2001 Ford Explorer Sport Trac

1 Answer

2001 Ford Explorer Sport running too lean in both banks


any of those sensors can cause that but the best thing to do is scan it or check for a vacuum leak with a smoke machine.

Jul 22, 2009 | 1998 Mercury Mystique

1 Answer

2003 Ford Explorer-Check engine light with codes lean bank 1 & 2


If you hear air in the engine, there must be a leak somewhere.
Check all the vaccum hoses for bad ones or dissconnected ones. All it takes is a pin hole in these darn emission systems to screw up the whole system.
It could also be a leaking intake manifold gasket.

Jul 13, 2009 | 2000 Ford Expedition

1 Answer

99ford explorer stalls at Idle


Have you checked the fuel filter recently? It should be changed every 20k miles or so. It is very cheap to replace if you have the disconnect tool for the lines. Also try an injector cleaner that you put inside your tank. This should rectify the problem. Hope this helps. Let me know. Good luck. Thanks for using FIX-YA. P.S. if you had a code for the o2 sensors then I would have directed you to replace them.

May 05, 2009 | 1999 Ford Explorer

1 Answer

Understanding codes


Both banks are running lean meaning they are getting too much air and not enough fuel.
To start I'd try an expensive can of fuel cleaner which may just clean up your system enough to clear the codes.
If carbon has built up or fuel is low and gunk is entering the system, this could be the problem especially if you run your gas tank to near low a lot and if you rarely use a fuel cleaner.

jackiaria

Mar 01, 2009 | 2001 Ford Explorer Sport

1 Answer

Location of O2 sensor in bank 2, 99 5.4 expedition, running lean


I have a ford 2003 windstar that was running very rough when cold and almost stalling. engine light came on. went to autozone and they read the codes for free and told me it was running lean on Bank 2 also. i came home searched for the O2 front sensors online using the info autozone gave me. there are 2 front sensors on my car that need to be replaced at the same time. look for ones that have a direct plug in and don't need wire splicing. the ones without the wiring harness are cheaper but more of a pain, i think.
they were fairly easy to replace. getting access with the wrench was the worst. reset the light by disconnecting the battery for a few minutes. seems fine now and the light hasn't come back on.

Jan 24, 2009 | 1999 Ford Expedition

1 Answer

Check Engine Light On


have the 02 sensors checked

Jan 20, 2009 | 2001 Ford Explorer

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

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