Air quality sensor (AQS), status
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Volvo S80, 2005 Volvo S80, 2004 Volvo S80, 2003 Volvo S80, and 2002 Volvo S80. However, it is still accessible from the selected car via links, so may be relevant.
The parameter displays the status of the air quality sensor (AQS) when the diagnostic trouble code (DTC) was stored.
Warm-up phase = the sensor is being heated by the heater element.
Faulty heater pad.
Faulty sensor.
Calibration commenced.