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Home >> Infiniti >> 2003 >> I35 >> Repair and Diagnosis >> External Pages >> Different car >> Section 237 (Engine Control System) >> DTC P0127: IAT Sensor >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2004 Infiniti I35. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK INTAKE AIR TEMPERATURE SENSOR 

    Check resistance between intake air temperature sensor terminals 3 and 5 as shown in Fig 1 and Fig 2 .

    Fig 1: Displaying Temperature Resistance Of IAT Sensor
    G00786592Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 2: Displaying Temperature Resistance Graph
    G00786593Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO 2.
    2. NG: Replace intake air temperature sensor.
  2. CHECK INTERMITTENT INCIDENT 
    1. : INSPECTION END