what year is your car mate?
its true the oil pickups suffer problems.. but you almost always get the "stop oil" message along with it
wayne on here had oil pressure problems after a remap, we figured it was a blocked pickup and some good engine flush solved his problems, so maybe try that before you tackle the sump
the traction light coming on is sometimes something completely unrelated to the esp/asr .. most commonly it's the MAF but that usually leaves an engine DTC. A bad maf would make it run like sh!t though. Does it run rough constantly or intermittently?