What are common issues that cause the Check Engine light to come on in the Audi A2?

I recently purchased a used Audi A2 and the Check Engine light came on after a few days of driving. What are some common issues that could trigger this warning and what steps should I take to resolve them?

One common cause for the Check Engine light in the Audi A2 is a faulty oxygen sensor. This sensor measures the amount of oxygen in the exhaust and can cause issues with fuel efficiency and emissions if not functioning properly. I recommend getting this checked and replaced by a certified mechanic, as a faulty oxygen sensor can lead to more serious engine problems in the long run.

Another possible cause for the Check Engine light in the Audi A2 is a loose gas cap. The gas cap helps to maintain pressure in the fuel tank and if not tightened properly, it can trigger the warning. Check to make sure the gas cap is securely tightened and if the issue persists, it may be worth investing in a new one as they can wear out over time.