Plug your interface cable into the laptop's USB port and connect the 16-pin OBD-II connector to your car's diagnostic port. Turn your vehicle's ignition to the "ON" position (do not start the engine). Launch the VCDS software, click on , select your USB port, and click Test . Once the screen displays a "Status: Questionable/Good" or "Interface Found" message, click Save . Safety and Best Practices
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Once you identify an issue and perform the necessary repairs, VCDS allows you to clear error codes and reset dashboard warning lights. Plug your interface cable into the laptop's USB