Where is a diagnostic port on civic coupe 98?

On a 1998 Honda Civic Coupe, the diagnostic port, also known as the OBD-II port, is located under the dashboard on the driver's side. It is typically found near the steering column, just above the brake pedal. You may need to remove a cover or panel to access it. This port allows for the connection of a diagnostic tool to read trouble codes from the vehicle's computer system.