OBD-II
OBD-II (On-Board Diagnostics II) is a standardized automotive diagnostic system mandated in most vehicles since 1996, primarily used to monitor vehicle performance and detect malfunctions. It provides access to real-time data from various sensors and control units, such as engine speed, fuel efficiency, and diagnostic trouble codes (DTCs), through a standardized connector. This system enables mechanics, technicians, and developers to diagnose issues, perform emissions testing, and develop automotive applications.
Developers should learn OBD-II when working on automotive software, telematics, fleet management, or IoT projects involving vehicles, as it allows for data extraction and vehicle diagnostics. It is essential for building applications that monitor vehicle health, optimize fuel efficiency, or integrate with smart car technologies, such as in automotive repair tools, insurance telematics, or connected car platforms.