Quote Originally Posted by BiLL|z0r
Excuse my ignorance, but what is an OBDII interface?
2nd generation of On-Board Diagnostics. The interface is just a plug that you connect an OBDII scanner to (can be hand held, PDA, Laptop based) and check to see if your cars recorded any tell-tale error codes among many other things.

If you want to know more Google is your friend.