Once in service, the car is diagnosed using a computer and its available OBD port. For a while now, various electronics manufacturers have begun offering OBD tools to everyone willing to buy them.

An OBD2 (On-Board Diagnostics II) scanner can provide information about the status and health of various vehicular systems.

Using the OBD II port, it gathers and displays information such as boost pressure, transmission temperature, and fuel-flow rate in real time.