I am working on a 2003 Jetta TDI. The original problem was the turbo leaking oil. It was driven for a while this way,then the owner said it lost power and was smoking. I didn't drive the car,I fixxed the turbo and cleaned up the vnt. It doesn't leak anymore,but it has no power. The vnt solenoid was sending vaccum to the actuator at idle,so I switched it with the egr solenoid,now I have no vaccum at all to the actuator. I have three codes. 17056 description unavailable, 17569n intake air temp sensor open/short to battery voltage, this code was there before any of this happened, and 17964 charge pressure regulation control limit not met. Any help would be great, thank you.