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    Thread: P0171 code

    1. 11-26-2018 10:28 AM #1
      Any thoughts on diagnosing this code on a 2009 EOS?

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    3. n00b
      Join Date
      Jan 5th, 2015
      South Carolina
      2008 EOS, 2013 Passat, 2017 Passat
      08-13-2019 06:58 PM #2
      P0171 Possible Causes

      Intake air leaks
      Faulty front heated oxygen sensor (this is my guess)
      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

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