So...I'm awaiting my Model 3. One of my Christmas presents I got was the BlueDriver Bluetooth OBD-II scanner, primarily for my '04 Chevy Avalanche, which has a tendency to trigger random check engine lights. My friend claims that when he plugged an OBD-II scanner into a co-worker's Fiat 500e, that it only gave a confirmation of a data connection, but no information on sub-systems. He said that since OBD-II is primarily an emissions system protocol, there's no reason for it to display anything on an EV. Does the official Tesla app or another third-party app display any kind of system diagnostics? Just curious. Thanks in advance.