Intake air temperature sensor (Mitsubishi Matrix)

The intake air temperature sensor is built into the absolute pressure sensor in the intake manifold. The sensor is designed as a variable resistor, the resistance of which changes depending on the air temperature at the intake. The engine control unit uses the signal from the intake air temperature sensor to regulate the duration of the control pulses supplied to the injectors. Having received information about the low intake air temperature, the ECU adjusts the composition of the working mixture towards enrichment by increasing the duration of the control pulses. At a higher air temperature, the fuel injection duration is reduced.

Conditions for storing fault codes

If the sensor indicates that the air temperature is below -45°C for 0.2 s in two driving cycles, the ECU stores the P0112 code in its memory and turns on the malfunction indicator lamp. This check is performed after the engine has been running while driving for 4 min 10 s and then idling for 30 s (without stopping the fuel supply when coasting). This code indicates that the air temperature value output by the sensor or ECU after the engine has warmed up is below normal.

Material was obtained from an official resource [HYUNDAIBOOK.ru]