It just got cold and icy here today and all of a sudden my backup sensor is incorrectly beeping. I guess somehow its ice build up but I want to know where. The black dots on the bumper are free and clear is there something behind the bumper that could have ice built up on them to cause the faulty warning?

 

Had that on mine most of the time after a wash but in the snow too.

dealer replaced two sensors.

only had it happen once since after a good bumper wash out.

 

mine do it when it gets covered in ice and sometimes even after the ice is off the sensors it does it until it seems to melt everything

 

thanks guys I'll see if it clears up when it gets warm. Not sure why ice would be a problem if the sensor dots you see on the bumper are clear of ice.