How do you troubleshoot a faulty fuel pressure sensor on an Audi A2?

I have been experiencing issues with my Audi A2's engine stalling and a decrease in fuel efficiency. After doing some research, I suspect it could be a faulty fuel pressure sensor. Can anyone offer any pointers on how to troubleshoot and fix this issue?

First, you should check if there is any damage or corrosion on the wiring leading to the fuel pressure sensor. If everything looks fine, try using a multimeter to test the sensor's resistance. If it falls outside of the specified range, then it's likely faulty and needs to be replaced.

A common symptom of a faulty fuel pressure sensor is a sudden drop in fuel pressure while driving. You can use a scan tool to monitor the fuel pressure readings and see if it's consistent with the manufacturer's specifications. If not, then it's likely the sensor causing the issue.