2004 f150 heritage
09-10-2011, 07:45 PM
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2004 f150 heritage
Why is it that my check engine light comes on every year whith the first cool spell, it always shows a P0174 code but when it gets warmer it goes away. I have already replaced the MAS and both oupper O2 sensors. I have had this problem for about three years now and the few mechanics I have taken it too have been unable to pin point the issue but want to guess it is the plenum, 1500.00 fix and they aren't sure...
