I have a 1999 Ford Windstar with trouble code's 171 and 174 what could it be?

Jacob W

New member
I have ran the codes checked it on the internet and they say mass air flow sensor or fuel filter.Well I replaced them both and nothing.I checked all the vacuum lines and there looks like there is no leak. Does anyone no what it could be? The ABS light is on too and I replaced all the sensors and it still is on any idea on that one this van is a pain in the butt.
 
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