This must be one of the most ridiculous things Elon has said. In fact, I think it is a good example of the "pseudo-science" you were talking about before.
AGI means that the same intelligence is able to perform many diverse tasks. For example, humans have generalized intelligence because the SAME human brain is able to learn many completely different tasks from riding a bicycle, driving a car, reading a book, writing music, dancing, swimming, building an object, solving a math problem, playing chess, giving a speech, arguing a case in court, talking to a friend on a topic, etc). These are all very different tasks that require different forms of intelligence yet the human brain is able to do all of them. That's AGI. Driving is not AGI, it is a specific task, a subset of AGI. Tesla FSD is designed to do the very specific task of driving and nothing else, so it is specialized intelligence, not AGI. So no, Tesla has not figured out aspects of AGI. Also, the term "mind" usually refers to human intellect. The FSD computer performs tasks and follows rules inside the neural nets but it is not thinking on its own and it is not capable of abstract thinking like humans can. So I am not sure I would call it a mind. It is a computer.