So here in Washington State we get a lot of rain. On rainy days my back up sensors scream at me as soon as I put my truck in reverse and thats with nothing behind my truck. Now yes I can just push my button in the cab and turn it off but when I bought the truck brand new it never had this issue, and now is this something Toyota should fix I would hope. That sensor started doing this around 80,000 miles but it is every time now when it rains with a little over 100,000 miles on my truck.