To reset the oil light on Your 2011 Porsche Cayenne is very simple, all You will need is an OBDII scan tool. You can find these tools either online or at an auto shop like the gearbox. You will go ahead turn your key in the ignition to the start position. Insert Your OBD II scanner into the required port. You will now follow the directions on your scanner to clear the oil light sensor. Once done, remove the scanner and switch off the car