2003, 5.4, p0172 code

Asked by May 07, 2017 at 11:03 PM about the 2003 Ford Expedition Eddie Bauer 4WD

Question type: Maintenance & Repair

2003, 5.4, p0172 code.  maf good, plugs, injectors and cop new, bank 1 oxy
sensor new.  rich   condition bank one (pass side) only.

1 Answer

83,765

P0172 FORD - System Too Rich Bank 1 3 | Add Comment Possible causes: Faulty front heated oxygen sensor, Ignition misfiring, Faulty fuel injectors, Exhaust gas leaks, Incorrect fuel pressure, Faulty Mass Air Flow (MAF) sensor...The code is detected when, - Fuel injection system does not operate properly. - The amount of mixture ratio compensation is too large. (The mixture ratio is too rich.).

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