Volvo XC60 Owner's Manual page 178

04 Driver support
Collision warning with Full Auto-brake and Pedestrian Detection*
Symbol Message
Radar blocked See
manual
Collision warn.
Service required
04
*
176
Option/accessory, for more information, see Introduction.
Description
Collision Warning and Auto-brake are temporarily not functioning. The radar sensor is blocked, for example
by heavy rain or snow that has accumulated in front of the sensor, and cannot detect other vehicles, see
page 156 for more information on the radar sensor's limitations.
Collision Warning and Auto-brake are partially or completely not functioning.
Contact a trained and qualified Volvo service technician if the message remains in the display.