A nit-picking terminology point: Nothing can be measured with VCDS. VCDS can only tell you what the car itself knows and is willing to report. So first and foremost, the question is: Does the car have a sensor to measure the pressure you're interested in? It's not entirely clear to me whether you're looking for oil pressure or the pressure of the gasses in your crank case. After you answer, I'll probably split these posts into a new thread since the question doesn't have anything to do with a 2003 1.8T.Can the crankcase pressure be measured with VAG-COM?