One problem related to check engine light on has been reported for the 2009 Volkswagen Jetta Sportwagen. The most recently reported issues are listed below.
We were traveling in branson, mo. From our home in east texas when there was what sounded like a single muffled pop from the engine compartment. The glow plug lamp started blinking and the check engine light came on and I think it was blinking also. At the time I was traveling about 30 mph. And I had just started up a steep grade. Also, about the time the glow plug light started blinking, the mfd displayed the "major engine malfunction" message. The engine lost power but did not stop and I was able to go about 300 yards to a safe place where I could pull off the street out of traffic and park. The vehicle was towed to the Volkswagen dealer in springfield, mo. (springfield Volkswagen) fault code thrown was p0299. It was determined that a coupling on a line going into the turbocharger had not been adequately tightened during assembly of the engine and the hose had come loose disabling the turbocharger and the engine.