Hello,It would relly help to know what the fault codes were, which triggered the CEL. But from experience, the issue is often caused by failing mass airflow sensor.
I don't know the fault codes and unfortunately the garage erased the codes when they checked the EGR. I have been told that it could be the turbo actuator?
Your car might have a compressor, but not the turbo. Compressor engines have several flaps to control the airflow. They require cleaning and re-adaptation with the Star Diagnosis machine.