2015 Cadillac CTS Owner Manual - Page 189

8-6 Sensor Climate Controls Air Quality Sensor If equipped with an air quality sensor, the climate control system adjusts to limit some exhaust fumes from being pulled inside the vehicle. Press the AUTO button on the climate control to activate the air quality sensor. The recirculation indicator light comes on when poor quality air is detected. The air quality sensor will not maintain recirculation for an extended period to prevent the air inside the vehicle from becoming too dry or stuffy. Under certain conditions, the air quality sensor will not activate, such as during cold weather or with extreme odors. Press @ to activate recirculation. The air quality sensor system does not protect against carbon monoxide (CO), which you cannot see or smell. See Engine Exhaust on page 9-22. The air quality sensor operation can be adjusted, See "Climate and Air Quality" under Vehicle Personalization on page 5-47. Rear Climate Control System If equipped, the rear climate control system is on the rear of the center console. The settings can be adjusted with the rear climate control buttons and the touch screen. The solar sensor, on top of the instrument panel near the windshield, monitors the solar heat. The climate control system uses the sensor information to adjust the temperature, fan speed, recirculation, and air delivery mode for best comfort. If the sensor is covered, the automatic climate control system may not work properly.