How to check if the high pressure fuel pump on my Audi A4 is faulty?

I've been experiencing some engine performance issues and suspect that it may be due to a faulty high pressure fuel pump. How can I check if this is the case and what should I look out for?

To check the high pressure fuel pump on your Audi A4, start by inspecting the fuel pressure sensor and corresponding wiring for any signs of damage or wear. You can also use a fuel pressure gauge to measure the pressure at the fuel rail to see if it meets specifications. If not, it may be necessary to replace the fuel pump.

In addition to checking the fuel pressure, you can also inspect the fuel pump relay and fuse for any faults. A faulty relay or blown fuse could also be causing issues with the high pressure fuel pump on your Audi A4.