Question about 2000 Ford Escort

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Service engine light is on

The code for this is po171. how do i fix this?

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  • jamesmrmn Dec 07, 2008

    the p0171 code means its running to lean it is getting more air then fuel the problems could me a vacuum leak after the maf (mass air flow) censor witch its by the air filter. incorrect fuel pressur, bad fuel injectors, bad fuel filter, or it could be the o2 censor. many people have problems with the maf censore witch can be cleand with break cleaner if that dose not work check you vacuum hose. i am in the prosses of doing that myself. i need a schematic for the vacum lines. if any one has them pelase email it to me,



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This sort of thing could be caused by a multitude of problems and without car in front of me i can only suggest taking car to dealers.sorry but if you changed everything it could be its cheaper to stick car in dealers

Posted on Dec 12, 2008


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Po171 code came up on my 99 jeep grand Cherokee larado an the air bag light is on an the abs light how do I fix theses problems

First step is to look up Jeep trouble code PO171
This is the link I found:

I don't know about the airbag or abs lights. My old AMC concord used to light up all sorts of odd ball combinations of lights to signal stuff not related. You could look under your seat to see if any wire harnesses have come unplugged by stowing things under the seat but if nothing is hanging down obviously I would focus on the code PO171 first. Which as you can see has a lot of possible fuel and air type problems. It points you in the general direction. It is the actual behavior and performance of the engine that is your main concern. How is it running and is there any other symptoms or power loss you can feel and when? Have you done your regular maintenance and replaced your air filter or any recommended fuel filter changes from the owner's manual? If that stuff is done often the appropriate spray cleaner from the auto parts store can get things back without any repair at all. I sprayed one sensors harness with electronic cleaner and my code went away because oil and dirt from my smoky engine was blocking the signals.

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Have if check engine light is on the unit scanned for a error code, most large auto parts stores will do this for free in hopes that if you need a part to fix that you will buy it from them, read the code and see what it means PO171 etc.

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