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  1. K

    codes p0174 and p0171

    2003 ford expedition xlt. truck runs rough and i have changed a lot of parts. i have tried cleaning the egr, replaced the egr pressure feedback sensor, the egr pressure solenoid switch, i have replaced the fuel filter. i have also replaced the ban k1 sensor 1 and bank 2 sensor 2. but stilll it...
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