DTC P111C-62: Control Module Internal Temperature Sensor/Intake Air Temperature Sensor Signal Compare Failure [12/2019 - 10/2022]: Description

The engine has an ECM internal temperature sensor and intake air temperature sensor.

The resistance of a thermistor within the ECM internal temperature sensor and intake air temperature sensor increases as the temperature decreases and decreases as the temperature increases.

The voltage monitored by the ECM changes in accordance with the change in the resistance of the thermistor.

The ECM performs control based on these voltages.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P111C-62	Control Module Internal Temperature Sensor/Intake Air Temperature Sensor Signal Compare Failure	All of the following conditions are met (2 trip detection logic): The auxiliary battery voltage is 8 V or higher. 7 hours or more have elapsed since the engine stopped on the previous trip. 0.5 seconds or more after ignition switch is turned to ON. Either of the following conditions is met: The minimum ECM internal temperature is -10°C (14°F) or higher. The minimum intake air temperature is -10°C (14°F) or higher. The difference between the readings of the ECM internal temperature and intake air temperature is higher than 20°C (36°F).	Intake air temperature sensor (mass air flow meter sub-assembly) ECM (ECM internal temperature sensor)	Comes on	DTC stored	SAE Code: P111C

DTC No.	Data List
P111C-62	Intake Air Temperature
	Ambient Temperature

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HINT: 

• Waiting is required to prevent the temperature of the engine from affecting the readings. If the engine has been operated recently, it is not possible to accurately compare the readings.
• For diagnosis, in order to duplicate the detection conditions of the DTC, it is necessary to park the vehicle for 7 hours. Parking the vehicle for 7 hours ensures that the actual temperature of the ECM internal temperature and intake air temperature (for mass airflow meter sub-assembly) are very similar. When the vehicle has been parked for less than 7 hours, differences in the readings may exist, but this does not necessarily indicate a fault.