2013 Ford Flex Owner Manual Printing 4 - Page 241

240 Blocked Sensor Cruise Control WARNING: Do not use ACC when towing a trailer with brake controls. Aftermarket trailer brakes will not function properly when ACC is activated because the brakes are electronically controlled. Failing to do so may result in loss of vehicle control, which could result in serious injury. WARNING: Do not use tires sizes other than those recommended because this can affect the normal operation of ACC. Failing to do so may result in a loss of vehicle control, which could result in serious injury. A message regarding a blocked sensor is displayed if the radar signals from the sensor have been obstructed. The sensor is located behind a fascia cover near the driver side of the lower grille. A vehicle ahead cannot be detected and the system will not function when the radar signals are obstructed. The following table lists possible causes and actions for this message being displayed. Cause Action The surface of the radar in the grille Clean the grille surface in front of is dirty or obstructed in some way. the radar or remove the object causing the obstruction. The surface of the radar in the grille Wait a short time. It may take is clean but the message remains in several minutes for the radar to the display. detect that it is no longer obstructed. Heavy rain or snow is interfering Do not use the system in these with the radar signals. conditions because it may not detect any vehicle ahead. Swirling water, or snow or ice on the Do not use system in these surface of the road may interfere conditions because it may not detect with the radar signals. any vehicle ahead. You are in a desert or remote area Wait a short time or switch to with no other vehicles and no normal cruise control. roadside objects. 2013 Flex (471) Owners Guide gf, 4th Printing, December 2012 USA (fus)