How do you reset emission control system on Audi A3 1.6 fSI?

To reset the emission control system on an Audi A3 1.6 FSI, you typically need to use an OBD-II scanner to clear any diagnostic trouble codes (DTCs) from the vehicle's computer. Start the engine and let it reach normal operating temperature, then connect the scanner to the OBD-II port, usually located under the dashboard. Follow the on-screen prompts to read and clear the codes. After resetting, it's advisable to drive the vehicle for a short distance to allow the system to recalibrate and monitor for any new issues.