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Home >> Toyota >> 2002 >> Sienna CE >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics >> Diagnostic Tests >> DTC P0110: Intake Air Temperature Sensor Circuit >> Circuit Description
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Circuit Description

Intake Air Temperature (IAT) sensor is a thermistor built into Mass Airflow (MAF) meter and is used to monitor temperature of intake air flowing through MAF meter. DTC is set when ECM detects an open or short in IAT sensor circuit. If DTC P0110 exists, ECM will operate in fail-safe mode in which intake air temperature is assumed to be 68°F (20°C). Possible causes are:

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