Kia Optima: Intake Air Temperature Sensor (IATS). Description and OperationTo calculate precise air quantity, correction of the air temperature is needed because air density varies according to the temperature. So the ECM uses not only MAPS signal but also IATS signal. This sensor has a Negative Temperature Coefficient (NTC) Thermister and it's resistance changes in reverse proportion to the temperature.

Installation
Intake Air Temperature Sensor (IATS). SpecificationsReplacement
1.
Disconnect the negative (-) battery
terminal.
2.
Recover the refrigerant with
a recovery/charging station.
3.
Disconnect the A/C pressure transduc ...
Push-starting
Your manual transaxle-equipped vehicle
should not be push-started because it
might damage the emission control system.
Vehicles equipped with automatic
transaxle cannot be push-started.
Follow ...