What causes the 'check engine' light to turn on in an Audi A3?

I recently noticed that the 'check engine' light turned on in my Audi A3. What could be causing this and how can I fix it?

The 'check engine' light could be indicating a number of different issues, ranging from a loose gas cap to a more serious engine problem. I would recommend taking your Audi A3 to a certified mechanic to get a diagnostic test and determine the proper course of action.

One common cause of the 'check engine' light turning on in an Audi A3 is a malfunctioning oxygen sensor. This may result in decreased fuel efficiency and potential damage to your catalytic converter. It's best to get this fixed as soon as possible to avoid any further damage.

Occasionally, the 'check engine' light may turn on due to a faulty mass airflow sensor. If this is the case, it's important to get it replaced because a malfunctioning sensor can lead to decreased performance and potentially cause engine damage.