The mass air flow sensor (MAF) may fail resulting in a rough engine idle, hesitation on acceleration, and/or engine stalling. The Check Engine Light may or may not illuminate. A failed mass air flow sensor will require replacement.Google+
Car Problem Reports
Ford Expedition Check Engine Light Due to Failed MAF Sensor
Ford Expedition Problem
Engines Affected: 4.6L V8, 5.4L V8
Average Mileage: 157,895 mi (95,000 mi - 280,000 mi)
Visitor, 1997 Ford Expedition, 5.4L V8, 126,000 mi
Rough idle/check engine light/ told to clean with MAF spray - Auto Zone
Visitor, 2003 Ford Expedition, 5.4L V8, 144,900 mi
engine sluggish at speeds of 45-55 mph and check engine light on and blinkls constantly.
Visitor, 2003 Ford Expedition, 5.4L V8, 166,000 mi
Check engine (service engine soon)light with rough idle at times. I have been able to get the light to reset by disconnecting negative battery cable to see if it would come back. Took a week for it to show back up the first time. Went to Auto Zone and pulled code. 171 and 174 I think. Do not remember the numbers but the employee said Mass Air Flow Sensor (MAF). $100 for replacement. Had to order. In mean time several videos on you tube. Looks pretty easy and much cheaper than taking it to a shop.
Visitor, 2002 Ford Expedition, 5.4L V8, 196,000 mi
Hesitation on acceleration
Visitor, 1999 Ford Expedition, 4.6L V8, 178,000 mi
Code 171 & 174; rough/high idle; not yet fixed.
Visitor, 2000 Ford Expedition, 5.4L V8, 130,000 mi
Not yet fixed. Newest code.
Visitor, 2003 Ford Expedition, 5.4L V8, 211,432 mi
Rough idling/accelerated hesation
Visitor, 2001 Ford Expedition, 4.6L V8
My fan clutch starts to wobble and touch cover over the fan itself.