Okay the type of FSD phantom braking after a new update = massive slow downs at intersections on two lane roads, slow downs whenever it sees another car at an intersection, slow downs and speed ups for no good reason, slams on the brake after it has made a decision to make a turn, slams on the brake during a turn.
If you experience all of these behaviors in rapid successions as if your FSD beta is broken or you feel like it has regressed 25 updates, reset that MCU.
After the reset, there may be also sometimes long drives when your steering wheel wouldn't allow you to engage. This is normal and after you can engage, FSDB will resume back to normal operation.
Resetting the MCU is just pressing down on both scroll wheel button for 10 seconds
Um. Just reporting from the FSD-b trenches.
The problem with FSD-b updates has been, in general, that Tesla digs in and fixes some really nasty behavior. In a
bit of a shell game, other things that either had been working reasonably well (for a given value of "reasonable") now start either working differently or, depending upon the user, worse. Those who hang out in the TMC FSD-b forums tend to call these.. changed behaviors, "regressions".
Problem is, calling something a regression is painting something with a pretty wide brush. In the past, some of those regressions have been down-right dangerous and fraught. And changed behaviors can cause trouble. People tend to internalize the mechanics of what the cars are doing in certain situations, to the point where one
expects that given a particular situation, the car's going to react in a certain way. If the car reacts in a
different way, this makes at least some of the users of the car somewhat bloody-minded and irritated. And it doesn't help much that some of the cars' behaviors under FSD-b appear to be probabilistic; that is, given what appears to be the same set of events entering a situation, one will get varying results, some of which might rightly be called dangerous, rather than one
expected result.
All of which leads to, shall we say, a certain amount of white-knuckle driving. But that's why this is a
beta program: It's still not ready for the general public.
Still, the recent release of the 11.3.3, 11.3.4, 11.3.5, and 11.3.6 FSD-b loads has been rather interesting. First: The city streets and highway driving stacks have been made one and the same. I can report that
most of the highway driving experience has shown decent improvement: Better braking, better lane change mechanics, and so on. Before, it was common when one switched from one slow lane to a faster lane, it wasn't uncommon for the car to seem to take
forever to speed up. It doesn't do that so much any more. There are the usual regressions, here: It used to be that the highway driving software more-or-less required human interaction to change lanes. If one is in FSD-b, the car
will change lanes on its own. But if the mapping software isn't quite up to snuff, a car might try and cross four lanes on an interstate in the process of hitting an off-ramp for a place where the car shouldn't be going anyway.
City streets are a bit of a mixed bag. On the one hand, the car handles turns smoother than it used to, which is nice. But it still manages to get stuck in the wrong lane. Stop sign handling is very slow, slower than the last major release. (Some of this might be due to the FHTSA.) Some intersections can now be handled, whereas in the previous release they couldn't. Some users claim that intersections that
did work now don't. Some users report that drives that would require an intervention per mile on the older software now requires six. (But there are other users in different environments who report the opposite..)
Were the 11.3.XX releases an improvement? My opinion is, "Yes!". Perfect? No way. But there's been a bunch of hypothesizing. The thought is that it was required that the local and highway stacks be unified; once that was done, then
more could be done.
So, we're all waiting with bated breath to see if the 11.4 release coming has more improvements, perhaps major ones.
And there we are.