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Home >> Nissan-Datsun >> 2002 >> Sentra SE-R Spec V >> Repair and Diagnosis (Single Page) >> External Pages >> Different car >> Section 405 (Engine Control System - DTC) >> DTC P0171, P0174: Fuel Injection System Function >> Diagnostic Procedure >> 2. Check For Intake Air Leak
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2. Check For Intake Air Leak

WARNING: This page is about a different car, the 2004 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. Listen for an intake air leak after the mass air flow sensor.
  2. Check PCV hose connection.

OK or NG 

  1. OK: GO TO 3.
  2. NG: Repair or replace.
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