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Home >> Infiniti >> 2003 >> I35 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0127: Intake Air Temperature Too High >> Circuit Description
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Circuit Description

The Intake Air Temperature (IAT) sensor (part of mass airflow sensor) detects intake air temperature and transmits a signal to the ECM. The temperature sensing unit uses a thermistor which is sensitive to changes in temperature. Electrical resistance of the thermistor decreases in response to temperature increase.

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