HI. I HAVE A 2000 VOLVO S40. MY LOW OIL PRESSURE LIGHT IS ON. I HAVE DROVE ABOUT 300 MILES WITH IT ON. ALSO CHEACK ENGIN LIGHT IS ON WITH CODE "P0171. CAN THIS CODE BE BECOUSE OF THE LOW OIL PRESSURE LIGHT? I WAS ALSO WONDERING WHERE THE OIL PAN O-RING IS LOCATED AND HOW MANY ARE THERE. THANK Y...