You Reply: Thanks for the reply! Last night, I verified that the LCD was working with both the Nano that came with the kit and the Uno r3. So, I think the length of the harness is most likely the issue here as I have completely disconnected the UART OBD-II and still cannot scan or send data to the I2C. While testing, the length of the cables used was 6" vs 3' (harness). I will most likely need to use/test cat5e for connecting the I2C.
This helped me understand better:
[url=http://raspberrypi.stackexchange.com/questions/7432/i2c-cable-length-and-type]http://raspberrypi.stackexchange.com/questions/7432/i2c-cable-length-and-type[/url]