How do i read codes on 2001 international 4700?

To read codes on a 2001 International 4700, you'll need an OBD-II scanner that is compatible with the vehicle's engine management system. Connect the scanner to the OBD-II port, usually located under the dashboard near the driver's seat. Turn the ignition key to the "On" position without starting the engine, then follow the scanner's prompts to retrieve and interpret the diagnostic trouble codes (DTCs). These codes will help you identify any issues with the vehicle's systems.