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1999 Ford Expedition Ford codes P0171 and P0174 still comin

Tiny
SHORT_ANGEL_101
  • MEMBER
  • 1999 FORD EXPEDITION
  • V8
  • 4WD
  • AUTOMATIC
  • 153,000 MILES
We changed out the MAF sensor. But after a day the light came back on and it is still those codes. Any suggestions?
Tuesday, January 15th, 2008 AT 12:33 PM

2 Replies

Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Check for a vacuum leak
that will effect the two banks
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Tuesday, January 15th, 2008 AT 12:36 PM
Tiny
ENFORCER67
  • MEMBER
  • 2 POSTS
I had that problem and it was one of the oxygen sensors, there are four of them. Two on each side of the y pipe, they come up as bank 1 and bank 2 on trouble codes.
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Sunday, February 17th, 2008 AT 10:09 AM

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