I don't have much experience with the CTD. I was having problems with my CEL coming on and the code said that there was a turbo underboost. I was told by one of my friends that the new engines (04.5-07) do not have a wastegate? Is that true? He told me that there was some kind of sensor on the turbo in place of the wastegate. He said that sensor could be causing the underboost code. I was just wondering if he knew what he was talking about. Does anyone know???