What is the cause of the high fuel consumption in my Audi A2?

I've noticed that my Audi A2's fuel consumption has increased significantly. I've been regularly maintaining it and driving conservatively. What could be causing this issue?

There could be a few possible causes for high fuel consumption in your Audi A2. One common reason is a faulty oxygen sensor, which can cause a leaner fuel mixture and increase fuel consumption. Another potential issue could be dirty fuel injectors, which can affect the engine's efficiency. It's best to have a mechanic check for any error codes and inspect these components.