Ford Repair Questions? Ask a Mechanic for Answers ASAP
P0405, p0488, p1335, are all related to the EGR valve. P0677 is for glow plug #7. You could have a bad glow plug most likely. As for the three EGR codes it's possible the programmer doesn't have the correct program installed from H&S. Sometimes you just need to call them and they can send you a new flash.
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