First road trip in my 2018 Model S since losing radar via 2022.20.9, now on 2022.24.8. Did about 400 miles in FL and GA, mostly good conditions, but some rain, heavy at times. Used NoA or Autosteer the entire time.
Some differences from previous trips, in no particular order:
- My car was more conservative about slowing down when cars were merging from entrance ramps on the right, often slowing down even if there was no chance the merging car would be ahead of me.
- Got the red steering wheel “take over immediately” alert 5 times during the trip, 4 times in good visibility conditions without much traffic, one time in the rain. Alert message was something like “Autopilot has been aborted due to system error.” When it happened, AP and TACC were unavailable for about 30 seconds, but then came back. No braking associated with this alert.
- During heavy rain, car would slow down with a message like “Autopilot speed reduced due to poor visibility.” No indication of what the new slower speed was, max speed still showed my set speed. Overrode the lower speed with the throttle, and eventually car would resume the set speed.
- Car showed the speed limit as 45 instead of 70 after reading the 45 limit sign for an exit to a service plaza. Didn’t correct until I passed another 70 sign a few miles later.
- When approaching a slower car, NoA would sometimes propose a lane change but immediately cancel, and repeat this a few times for each incident. I have lane change confirmations enabled.
- Auto headlights don’t turn on in some conditions where they always did before. Even when it started to rain, the lights didn’t come on until the wipers did. I noticed this same issue in my wife’s 2018 Model 3 after she got 2022.20.9.
On the plus side, I didn’t have any phantom braking events (but they were always infrequent for me), and car did very well in heavy downpours (never disengaged AP completely other than the system error alerts). The system error alerts were the only real nuisance because they were unpredictable.