yea key is on when trying to run it. obd 2 port in the car is working. I actually use torque pro to clear an evap code evertime i try to attempt to use the avt box. Which that code stays cleared for a few days. The box also has a light on it that turns on when its hooked up to the computer, well after i installed the ftdi driver that is. Also i tried on another 3800 car also and that one has no check engine lights and obd 2 port is working.