Charge Air Cooler Temperature (CACT) Sensor
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2010 Mercury Milan, 2010 Mercury Mariner, 2010 Mercury Grand Marquis, 2010 Lincoln Town Car, and 2010 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 powertrain control module (PCM) uses the information from the CACT sensor to refine the estimate of the air flow rate through the throttle and to determine the desired boost pressure. The CACT sensor for a speed density system is integral with the turbocharger boost pressure (TCBP) sensor.