My front and rear parking sensors always show the first two red bars (from left to right) without any audible warning, the lights go out once I reach 10 mph and when I go below this speed they come on again.
​​​​​​​I've also drove right up to my garage door (2-3 inches from the door) and no change in the sensor lights on the dash and no audible warning either - has anyone else experienced the same problem and if so what was the fix?*