On Teslas, technicians can enable a service mode that show a lot of data on the dashboard. It’s not accessible to everyone and requires a password.
My old i3 BMW also had a service menu that you could access after pressing a button for a while and entering a password that was some kind of checksum of the VIN.
But an ODB2 dongle is probably something important to have in your toolbox.
And for a new car, you may prefer to let the company fix it under warranty while you get a loaner.
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On Teslas, technicians can enable a service mode that show a lot of data on the dashboard. It’s not accessible to everyone and requires a password.
My old i3 BMW also had a service menu that you could access after pressing a button for a while and entering a password that was some kind of checksum of the VIN.
But an ODB2 dongle is probably something important to have in your toolbox.
And for a new car, you may prefer to let the company fix it under warranty while you get a loaner.