2002 Ford F-150 trouble codes

Tiny
SANTAFECOCHRAN
  • MEMBER
  • 2002 FORD F-150
  • V8
  • 4WD
  • AUTOMATIC
  • 103,300 MILES
Possible soultions for trouble codes P0171 & P0174
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Thursday, March 18th, 2010 AT 8:34 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • EXPERT
It sounds like a vacuum leak to me. THe most common problem is a vacuum leak behind the throttle body (near the IAC). It is a vacuum hose that is aprox 3/8" and has a 90 degree bend in it. The hoses dry rot there and cause leaks.

Check that and let me know what you find. Also, check for other vacuum leaks (broken, dryrotted, disconnected hoses).

Joe
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Sunday, March 21st, 2010 AT 12:23 AM

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