What purpose to use diagnostic tool on vehicles how it’s works

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Diagnostic tools are used to identify and troubleshoot issues in vehicles by analyzing data from various sensors and systems.

Diagnostic tools can read error codes and provide real-time data on engine performance, emissions, and other critical systems.
They can help identify issues with the engine, transmission, brakes, and other components.
Diagnostic tools work by connecting to the vehicle's onboard computer system and analyzing data from various sensors and systems.
They can also be used to reset warning lights and perform maintenance tasks like oil changes and tire rotations.
Examples of diagnostic tools include OBD scanners, multimeters, and oscilloscopes.