My 2020 Nissan Altima has had a number of sensor failures, this one being the most repetitive. The attached photo is what the collision sensor warning indicator looks like. My vehicle comes equipped with the advanced driving assistance, and it affects that.

My car will show that light blinking, and the car will refuse to operate driving assistance while active. If active, it will turn it off. It will not go away, until the car is turned on/off again. It will come back on eventually, however.

Nissan did advise me that sometimes the sensor is not broken, and that the front camera could be covered or dirty or obstructed by sunlight etc... though in my case it was broken because it was consistent and routinely happening.

It has been replaced twice since typing this, and also reprogrammed several times. Nissan did replace the front and back sensors, but in some cases, it may only be one of them needing replacement, and Nissan was not sure of which one to replace. The reprogramming ultimately did not fix it, and the front sensors needed to be replaced. It has not occurred for since the last replacement, so I assume it has worked this time.