N No one New member Aug 22, 2010 #1 connected a scan tool to my truck and all these codes popped up. P0402- excessvice flow detected P0171-lean fuel bank 1 P0174-lean fuel bank 2 someone told me it might be egr valve another said it can be a bad MAF sensor....
connected a scan tool to my truck and all these codes popped up. P0402- excessvice flow detected P0171-lean fuel bank 1 P0174-lean fuel bank 2 someone told me it might be egr valve another said it can be a bad MAF sensor....
