• Tiny
  • pchulo58
  • 2001 Ford F-150

Engine Performance problem
2001 Ford F150 V8 Four Wheel Drive Automatic 104, 00 miles

my engine has a hesitation when I accelerate. I get the code PO174. What is this?

Do you
have the same problem?
Friday, March 6th, 2009 AT 9:05 PM

1 Reply

  • Tiny
  • Dave H
  • Expert
  • 13,547 posts

Check/clean or replace the MAF sensor !

41) Continuous Memory DTC P0171, P0172, P0174 Or P0175: Fuel System At Corrected Fuel Trim

DTCs P0171, P0172, P0174 and P0175 indicate a problem when adaptive fuel strategy senses a lean or rich condition beyond the minimum or maximum calibrated limit. Possible causes for these faults are:
Fuel System

Excessive fuel pressure, leaking or contaminated fuel injectors, leaking fuel pressure regulator, low fuel pressure or engine running out of fuel or vapory recovery system fault.
Induction System

Air leaks after MAF sensor, air intake system obstructions, vacuum leaks, PCV system or improperly seated engine oil dipstick.
EGR System

Leaking gasket, stuck EGR valve or leaking diaphragm or EVR.
Engine Mechanical

Engine oil overfilled, cam timing, cylinder compression or exhaust leaks before or near HO2S.
Inspect engine for obvious defects in specified systems. Repair as necessary


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Friday, March 6th, 2009 AT 9:30 PM

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