Question about 1999 Mercury Cougar
I have a 2002 mercury cougar 4 cylinder and the check engine light is on and won't go off. i have replaced the o2 sensors and the mass air flow meter. the same code pops up everytime i try to go through emmisions. the code is p0171 system is too lean (bank 1) what could it be and how do i fix it.
Might be number one fuel injector not letting enough gas enter the # 1 cylinder.
Posted on Jun 05, 2009
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Posted on Jan 02, 2017
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