As smart as our phones have become, our cars remain dumb. Most older vehicles lack any kind of wireless connectivity, and outside of a few warning lights can't even communicate with their owners about the specifics of any problem. In most vehicles on the road, knowing what's causing a check engine light to switch on requires special scanners, sifting through trouble codes and usually a trip to the repair shop.
https://autos.yahoo.com/blogs/motora...152952983.html