Q: Smoke from exhaust still after new PCV and turbo

Hi there, thanks for writing in. I am sure that you have driven your car far enough (since repairs) to rule out residual oil in the exhaust system. The P0015 "cam retard" code may be a cam sensor, oil control solenoid or actuator issue. There is also the possibility of cam timing was set-up incorrectly. The real concern for me is the fact you have some engine blow-by and exhaust smoke. Although, it passes the glove test at idle, it may not pass under load. Check to see if blow-by is present under load. If there is, the possibilities are piston and/or piston sealing rings failure. A retarded exhaust cam could cause blow-by and set codes. The continued exhaust smoke, along with blow-by, leads me to believe lower end issues. Sometimes when cylinder head work is done on an engine with higher mileage, piston rings fail. Here at YourMechanic, we can have a technician come to your home or office to inspect and diagnose this issue for you, and make or suggest the necessary repairs.