How to repair an Audi engine?

I have an Audi car and the engine seems to be malfunctioning. Can someone guide me on how to repair an Audi engine by myself?

Firstly, you will need to diagnose the problem with your engine. Use an OBD scanner to retrieve the error codes and identify the issue. Then, gather all the necessary tools and parts for the repair.

Next, refer to your car's manual or search online for guides on how to fix the specific issue with your Audi engine. Follow the instructions carefully and make sure to take necessary safety precautions.