Charge Air Cooler Temperature (CACT) Sensor
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The CACT sensor is located in the intake air tube between the charge air cooler (CAC) and the throttle body. The CACT sensor measures the throttle inlet temperature. The PCM uses the CACT sensor information to refine the estimate of the airflow rate through the throttle and to determine the desired boost pressure. The CACT sensor for a speed density system is integrated with the turbocharger boost pressure (TCBP) sensor.