MY VANTAGE HAS 2.1 SOFTWARE, I DISCOVERED AFTER PUTTING IN A NEW FUEL PUMP IN A CHEVY TRUCK THAT THE CALIBRATION WAS WAY OFF. THE TRUCK SHOULDN'T HAVE EVEN STARTED WITH THE READING THE VANTAGE GAVE. MECHANICAL GUAGE VERIFIED PRESS OK. PUT MY TANSDUCER ON THE M... Login to read more.