How to troubleshoot a flashing check engine light on the Audi A4?

My Audi A4's check engine light is flashing, what could be causing this and what can I do to fix it?

First, check your gas cap to see if it is tight. A loose gas cap can cause the check engine light to come on.

If the gas cap is not the issue, it is important to have the code read to determine the specific problem. This can be done at most auto parts stores for free.

Based on the code, you can either fix the issue yourself or take it to a mechanic. Keep in mind that the longer you wait, the more damage can be done to your vehicle.