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Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 403 (Engine Control System) >> DTC P0171, P0174: Fuel Injection System Function >> Diagnostic Procedure >> 7. Check Mass Air Flow Sensor >> With GST
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With GST

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install all removed parts.
  2. Check mass air flow sensor signal in MODE 1 with GST.

    3.8 - 5.2 g.m/sec: at idling 

    16.0 - 21.5 g.m/sec: at 2,500 RPM 

OK or NG 

  1. OK: GO TO 8.
  2. NG: Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or grounds. Refer to DTC P0101: MAF SENSOR .
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