Question about 2005 Ford F-150
Truck is running fine and the check engine light came on,code is P0171,system too lean (bank 1)What can i check to fix! thanks oh by the way it's a 5.4 4x4 auto
You can try cleaning the MAF first:
If the code comes back after clearing it, check the spark plugs (not an easy task). My 2000 Expedition had fouled plugs....the 5.4 has a bad head design with recessed spark plugs.
Posted on Jun 24, 2009
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Posted on Jan 02, 2017
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