1999 Ford Ranger Codes Po171 Po174 Which System Adaptive Fuel Lean On Bank1

1999 FORD RANGER
10,000 MILES
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CHRISTINEPOTTER
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  • 2 POSTS
Codes of PO171 and PO174 which says System adaptive fuel to lean on Bank1 and Bank2. What does this mean and how do I fix it?
Feb 24, 2013 at 3:36 PM
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SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
It means the engine is running lean or thinks its running lean.I would first check the actual fuel pressure?Then look for vacuum leaks.
Sep 26, 2019 at 3:13 AM
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CHRISTINEPOTTER
  • MEMBER
  • 2 POSTS
Thank you so much. I will try that.
Sep 26, 2019 at 3:13 AM
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SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
Your welcome.
Sep 26, 2019 at 3:13 AM
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