There is a high pitch beeping similar to when you encounter an obstacle with the EyeSight function that continues for 1 minute every time you take your foot off the brake while in drive and begin to gas the car. This began after my battery died for the 3rd time and the rear gate no longer opens manually, with the fob, or when pushing the button to the left and below the steering wheel. Apart from being incredibly annoying, it's also concerning because it distracts from the actual utility of any warning signals that might be true indications of obstacles. In other words, it's a false positive and I suspect it's also leading to many false negatives by the car being unable to accurately detect problems.