Originally Posted by Debbie Forthun Kitchen

Hope it is something simple yet mine was not the oil pump, the problem is in the top of the engine and it usually occurs 120K or so miles (in USA). The heat of the engine (something about being aluminium) cracks a ring that allows oil to seep that creates the drop in oil pressure. So early its a rebuild of the top of the engine, you'll hear the tic tic tic sound eventually. Later its an engine rebuild. The oil pump, sensors and wiring was never the problem.