P0171 and p0174

10

Asked by Jul 13, 2014 at 04:29 AM about the 2001 Ford Expedition Eddie Bauer

Question type: Maintenance & Repair

Hi I can't seem to find the problem I
did the flowing:

2 Answers

.Both banks too lean ....http://engine-codes.com/p0171_ford.html .....and http://engine-codes.com/p0174_ford.html ..usually the MAF dirty of failed Or a vacuum leak. See http://www.smogtips.com/smog-question/1018/What-causes-Trouble-Code-P0171-and-P0174-Ford-Expedition

4 of 4 people found this helpful.

There is another article at: http://troubleshootmyvehicle.com/ford/4.6L-5.4L/troubleshooting-p0171-and-p0174-page-1 ..... that may help too

6 of 6 people found this helpful.

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