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Home >> Infiniti >> 2012 >> FX50 >> Repair and Diagnosis >> External Pages >> Different car >> Section 231 (Engine Control System - DTCS U0101 Through P0128) >> DTC P0127: IAT Sensor >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

WARNING: This page is about a different car, the 2011 Infiniti EX35. However, it is still accessible from the selected car via links, so may be relevant.
DTC DETECTION LOGIC

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0127 Intake air temperature too high Rationally incorrect voltage from the sensor is sent to ECM, compared with the voltage signal from engine coolant temperature sensor.
  • Harness or connectors (The sensor circuit is open or shorted)
  • Intake air temperature sensor