Do you remember the name of the novel? Sounds like a fun read :)
The novel you might be referring to is "Do Androids Dream of Electric Sheep?" by Philip K. Dick. In this novel, there are self-driving cars called "hovercars" that are powered by organic artificial intelligence, including dog brains. The novel has been adapted into the movie "Blade Runner".
I honestly don't remember anything about the plot of the book except for flying cars and dog brains. It wasn't by Philip K Dick though.