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Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 367 (2004 - Engine Control System - Coupe) >> DTC P0171, P0174: Fuel Injection System Function >> Diagnostic Procedure >> 6. Check Mass Air Flow Sensor
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6. Check Mass Air Flow Sensor

WARNING: This page is about a different car, the 2004 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

WITH CONSULT-II 

  1. Install all removed parts.
  2. Check "MASS AIR FLOW" in "DATA MONITOR" mode with CONSULT-II.
    1. 2.0 - 6.0 g.m/sec: at idling 
    2. 7.0 - 20.0 g.m/sec: at 2,500 rpm 

WITH GST 

  1. Install all removed parts.
  2. Check mass air flow sensor signal in "MODE 1" with GST.
    1. 2.0 - 6.0 g.m/sec: at idling 
    2. 7.0 - 20.0 g.m/sec: at 2,500 rpm 

OK or NG 

OK: GO TO 7.

NG: Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or grounds. Refer to "DTC P0101 MAF SENSOR ".