Comment by bonestamp2

I agree that would be cool, although with 2018+ cars this is going to get very difficult. Manufacturers are starting to encrypt bus traffic and add firewalls that will prevent unauthorized communication between certain ECUs and from the J1962 connector (aka "OBDII Port").

I work for an auto supplier that supplies vehicle communication software, so I can confirm first hand that some 2018 vehicles currently on sale already have these firewalls:

http://www.bosch-mobility-solutions.com/en/products-and-serv...