Hey,
As mentioned by you, what you're trying to do is access CAN Bus data from your phone over a wireless network.
What you should really be going for is using an Internet of Things board to get your data onto the cloud where it can be viewed using your laptop/smartphone/tablet, whatever and wherever. I'm part of a company that deals with IOT Technology(Also known as M2M) and would love to take over this project. Do let me know if you're interested and we could further discuss the terms as well as your requirements.
Hope to hear from you soon 