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Home >> Infiniti >> 2004 >> FX35 RWD >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> DTC P0127 IAT Sensor >> Diagnostic Procedure

Diagnostic Procedure

  1. Check Ground Connections 
    1. Turn ignition switch OFF.
    2. Loosen and retighten three ground screws on the body. See Figure. Refer to GROUND INSPECTION .

    OK or NG

    1. OK: Go to 2.
    2. NG: Repair or replace ground connections.

  2. Check Intake Air Temperature Sensor 

    Refer to COMPONENT INSPECTION .

    OK or NG

    1. OK: Go to 3.
    2. NG: Replace mass air flow sensor (with intake air temperature sensor).

  3. Check Intermittent Incident 

    Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

    Refer to WIRING DIAGRAM .

    1. Inspection end 
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