For Shop Owners

P0171 FORD - Fuel Injection System Too Lean Bank 1

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3 What does this mean?

Possible causes

  • Intake air leaks
  • Faulty front heated oxygen sensor
  • Ignition misfiring
  • Faulty fuel injectors
  • Exhaust gas leaks
  • Incorrect fuel pressure
  • Lack of fuel
  • Faulty Mass Air Flow (MAF) sensor
  • Incorrect Positive Crankcase Ventilation (PCV) hose connection
What does this mean?

Tech notes

If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the air flow meter. If the problem persistss the front oxygen (O2) sensor may need to be replaced.

It's a very common problem for the Ford Windstar. Link to a website with information on how to repair: 1999-2003 Fords Windstar Code P0171

2004 FORD F150 P0171, P0174, P0301, Misfire and Lean Condition













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Posted and Edit by kvjournal.ru 09-09-2016