Originally Posted by
dr.mike
The 30-0300 and 30-0310 work through the CAN interface on the Pro-Link.
The 30-0334 or, the re-flashed versions of the 30-0300 or 30-0310, work through the vehicle's OBDII port. Usually, via a pass-thru connector. But, they can, alternately, be wired into the CAN pins on the back of the OBDII port. In this case, it works with the standard version of the MPVI2. i.e. it does not require the Pro Features/Pro-Link. But, it only works with CAN based ECUs. Which are, usually, 2007, or later.