In some cases, the engine may be hard starting and/or get poor fuel economy Poor engine performance/hesitation on acceleration
Faulty Intake Air Temperature (IAT) sensor
Dirty air filter
Intake Air Temperature (IAT) sensor harness is open or shorted
Intake Air Temperature (IAT) Sensor circuit poor electrical connection
Intake Air Temperature Sensor: Intake Air Temperature Sensor measures the temperature of air at which it is taken into the engine. This car's malfunctioning sensor will lead to engine stalling, lack of power and engine noises
Check the IAT sensor connector with the key on and the engine off. There needs to be a steady 5 volt reference voltage and a very good ground.