How can I troubleshoot a faulty sensor in my Audi A2?

My Audi A2's check engine light keeps coming on due to a faulty sensor. What are the steps to properly diagnose and fix this issue?

Check the sensor's wiring and connections for any damages or loose connections, as this is a common cause for faulty sensors. Additionally, use an OBD2 scanner to read the error code associated with the check engine light and research its meaning, as it could be pointing to a specific sensor. Remember to always disconnect the battery before working on any electrical components.