Question about 2001 Ford F150 Styleside SuperCrew
Those codes are for "lean" fuel mixture conditions. Look for vacuum hoses or intake vacuum leaks. I asume that this is a 4.6 or 5.4 liter engine in which case there may be a problem with intake manifold gaskets leaking or injector "o" rings leaking. I would advise you to have it diagnosed by a qualified technician and verify the lean condition's cause. Other reason's for lean conditions can be low fuel pressure or bad fuel regulator. Or, possible clogged fuel filter. Ther is also a chance that the oxygen sensors may be causing this.
hope this helps
Posted on Oct 23, 2013
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Posted on Jan 02, 2017
Check for vacuum leaks, especially the intake manifold gaskets. If those are o.k., clean the Mass air flow sensor.
Posted on Apr 12, 2009
SOURCE: 1999 ford windstar 3.8 eng miss
remove the plenum take out injectors have them rebuilt change your plugs should clearup problem.
ps if you have blowby problem could come back in a few months of driving.
Posted on Jun 01, 2009
SOURCE: code po171 7 po174
your computer is reporting bank 1 and 2 too lean, usually caused by the mass air flow (MAF) sensor, you can usually clean this sensor and reset the light. Clean it with electric cleaner or brake cleaner, make sure it is dry before reinstalling, also take care not to damage it. Hope this helps, let me know
Posted on Jun 09, 2009
This is a tough one could be mass air flow sensor ,oxyegen sensors,a fuel filter. a vacum leak, a pcv valve if i missed anything just google po 171 &174 look for fix ya this issue has been addressed many times first check the vacum lines includeing the line on the pcv valve for cracks or splits in the lines .I would do the fuel filter if it hasnt been changed in the last couple of years , if still a problem the MAF sensor if your happy with my advise please leave me with great feedback
Posted on Feb 19, 2013
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