I assume your asking what problems a bad IAT sensor will cause.... You may want to read ur questions before posting them... Very rare to see a bad IAT sensor on any car. They don't do much, unless you have a code for only a bad IAT, its not the problem. Simply measures underhood temp or the temp of the air after the air cleaner.
the iat sensor is located on the tube running from the air cleaner the sensor has a wire connector running to it
Its the white wire with the violet stripe on it.
It is hooked to your blower in the front of the engine. It is also called the Mass Air Flow sensor.
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The IAT sensor, or intake air temperature sensor, is located on the tubing the of intake on a 1991 Acura Integra. This sensor reports the temperature of air coming into the engine directly to the ECU.
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The 2002 Lincoln LS mass airflow sensor can be found on the air cleaner housing. The mass airflow sensor will be on the back side of the air cleaner housing.
inside the gas tank.
In the latch mechanism