The Low Performance Light came on on our 2001 Wagon ( 60,000 miles) . $1,300 later the dealer said the problem was a plugged Crank Case Ventaltion valve. We were told that we should have had it cleaned at our 30,000 mile check up. We have brought our car in to the dealer every 5, 000 miles for an oil change, and also have had all recommended services done. Has any one heard of this problem?