206 engine failure

My car 2007 model diesel 206. A few days ago, my vehicle's turbo malfunction light came on and the vehicle did not exceed 3000 cycles. from time to time, this problem repeats and then improves. Now, while the vehicle is running, it kicks and stops in 2000 rpm. occasional oil or battery fault light is on when I turn the ignition off and on, the fault lights go out. When I showed it to the master, he said that the turbo egr valve should change, but he said it was okay to use. But how many times did this last stop failure repeat in big? with knowledge of the situation?