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Home >> Infiniti >> 2019 >> QX50 Essential, FWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (3 Of 12) >> DTC/Circuit Diagnosis >> DTC P0127: IAT Sensor >> Component Inspection (Intake Air Temperature Sensor 1)
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Component Inspection (Intake Air Temperature Sensor 1)

  1. CHECK INTAKE AIR TEMPERATURE (IAT) SENSOR 1 
    1. Turn ignition switch OFF.
    2. Disconnect mass air flow (MAF) sensor harness connector.
    3. Check resistance between mass air flow sensor terminals as per the following.

    Mass air flow sensor

    Condition

    Resistance (k©)

    +

    -

    Terminals

    3

    4

    Temperature [ deg.C (deg.F)]

    25 (77)

    1.800 - 2.200

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Replace MAF sensor (IAT sensor 1 is built-in). Refer to Exploded View .