I am new here and just started to play with Arduino about 3 weeks ago. Since I have lots of expertise in software programming and some knowledge about micro-controllers, it's really quick for me to start developing useful things on the Arduino platform. I think Arduino is so wonderful invention for us software guys. I spent 2 weeks to make an Arduino board connect with my car through OBD-II port, reading out the data and displaying them on a 84x48 LCD shield. It's great fun! I wrote an article
a complete guide to hacking your vehicle bus on the cheap & easy – part 1 (hardware interface)
Freematics OBD
CAN-BUS Shield Hookup Guide - SparkFun Learn
simple' CANBUS or OBDII project - where to start - Networking, Protocols, and Devices - Arduino Forum
180+ Arduino Projects for Engineering Students
Getting Started with OBD-II - SparkFun Learn
Arduino, Processing and Obd-ii. [serial communication between 3 devices?] - Programming Questions - Arduino Forum
Arduino Uno development board scales to 32 bits - EDN
CAR HACK: CAN-BUS Shield OBD + Arduino UNO R3 - Project Guidance - Arduino Forum
Arduino Chat
Arduino vehicle OBD-II data logger - Science and Measurement - Arduino Forum
To get Obd2 Data via ELM327 C#.NET
Is it possible to connect to my cars OBD2 port via UNO R4 - Hardware - Arduino Forum
OBDuino, onboard diagnostic for your car - Exhibition - Arduino Forum
Car to Arduino Communication: CAN Bus Sniffing and Broadcasting With Arduino : 4 Steps - Instructables