The oil pressure light never turned on. But yeah the tapping and P0012 came on at the same time and are always present, cold/warm/hot and at any RPM. Like I said the pump is brand new and the oil sensor is located on the output of the oil filter housing for it to come on in case it gets clogged to alarm the driver. So the oil filter, housing, pump, pressure valve and oil passages to the sensor are prob ok. Issue is between bank1 and bank2 or bank1 and oil filter housing but dunno know how it s routed.... Thanks again!