When the engine fluorescent on your VW comes on, it way that either accepted continuation is required, or there is an electrical-component-related crunch with your vehicle. Before you admit the vehicle serviced, you can troubleshoot the engine light. To do this, you need a special tool that can read the on-board diagnostic computer's error codes. This tool is called an OBD tool.
Instructions
1. Open the fuse panel cover underneath the steering column cover. Turn the knob on the fuse cover counterclockwise to unlock it and pull the fuse cover off the fuse panel.
2. Locate the port for the OBD tool. There is only one port large enough to accommodate the OBD tool on the fuse panel.
Each VW vehicle model may have different error codes depending on the year of the vehicle and the options equipped on the vehicle.
Turn the ignition key to the "II" position. Wait for the ODB computer to send a signal to the OBD tool. A code will be generated on the display screen of the OBD tool. You will need to consult your VW vehicle's service manual for the error codes to know what the specific issue or problem is.3. Plug the electrical connector on the OBD tool into the port on the fuse panel.4.