Tesla rolled out Autopilot 2.0 earlier this year that added, among other features, low-speed autosteering (35 MPH). This is designed to allow Autopilot to be used on non-highways; Autopilot 1.0 was designed specifically for highways.
It looks like Autopilot 2.0 isn’t working out too well for YouTuber “Scott S,” who posted the above video that shows his Model S fail miserably while driving on a windy road at night with Autosteer and Traffic-aware cruise control (TACC) engaged.
Despite a clearly marked double yellow line and great weather conditions, the Model S can’t stay in its lane, constantly veering to the other side of the road, forcing the driver to take control of the wheel.
A commenter on the YouTube video suggested that perhaps the Model S sensors hadn’t been properly calibrated after the Autopilot 2.0 update, but Scott claims it’s not a hardware issue.