Charge Air Cooler Temperature (CACT) Sensor
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2011 Mercury Milan, 2011 Mercury Mariner, 2011 Mercury Grand Marquis, 2011 Lincoln Town Car, and 2011 Lincoln Navigator L. However, it is still accessible from the selected car via links, so may be relevant.
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.