When approaching an intersection with a green protected left turn light, just as the light changed to yellow and I entered the intersection, FSD jammed to a stop.  Later I discovered that FSD had disengaged **by itself**, and if you check the video closely, my car actually drifted slightly because I did not have my hands and feet on the wheel or pedals.  I don't believe I disengaged FSD because it was in control when entering the turn.

Since the light had changed and traffic began flowing, I remained where I was at, well beyond the stop line.  I immediately reported this to Tesla.

I have *never* had FSD drop out like this.  The only thing I can think of that might have caused FSD to become confused, was the car in the opposite left-turn lane made a wide turn to set up for making a U-turn, and half-way crossed over into the straight-going lane.  Perhaps FSD thought the car might continue straight through at me and panicked, because the steering became a bit erratic and, of course, of the hard braking.

Can anyone tell me what happened?  I don't know how to save a video showing the FSD data, but I did go to  [Tesla Dashcam SEI Explorer](https://teslamotors.github.io/dashcam/sei_explorer.html) and stepped through my videos frame-by-frame.  FSD did instantly drop out right after the hard braking, and the steering had become slightly erratic.  The brake never came on, and the accelerator was never pressed.  So I don't know.

FSD v14.2.2.4 with 2025.45.9.1 freaks out and quits in intersection