The car has 150,000 Km's (90,000 miles?). It has been flawless, until\nthe MIL - P0420. Subaru dealer wanted to play "Replace parts til he's\nbroke" I have changed the rear O2 sensor, now have a new catalytic\nconverter. I do not wish to just keep throwing parts at it. I thought\nthat a Subaru dealer should have the equipment to look at the ECM inputs\nand O2 outputs, etc...\nHELP... if anyone has experienced this or something like it, I would\nappreciate any help. Where do I go from here, BROKE ??