Tl* the contact owns a 2009 lexus is 350. while driving at approximately 45 mph, the oil engine warning light illuminated continuously. the vehicle was taken to the dealer where the failure was undetermined. the vehicle was taken on a second occasion to a dealer where it was diagnosed that the carbon build up was causing excessive oil consumption and the direct fuel ejection technology needed to be replaced. the vehicle was not repaired. the manufacturer was notified of the failure. the failure mileage was unknown.