Question about 2004 Ford F150
Have A 2004 Ford F150 Heritige 4.2 2wheel drive,auto, Check engine light is on ,showing code 171 &174 con you fix this problem.
first check out for o2 sensor if its faulty this can show up.but if its proper.Evaporative emission control system leak very small 171 System too lean (bank 1) 174 System too lean (bank 2)
Posted on Jan 05, 2009
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Posted on Jan 02, 2017
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