Vehicle diagnostics refers to the process of identifying and troubleshooting issues within a vehicle's systems. This is typically done using specialized tools and software that can read data from the vehicle's onboard computer. By analyzing this data, technicians can pinpoint problems related to the engine, transmission, brakes, and other critical components, ensuring the vehicle operates efficiently and safely. Modern vehicles are equipped with various sensors and electronic control units (ECUs) that monitor performance. When a problem arises, the check engine light may illuminate, prompting a diagnostic check. Regular diagnostics can help prevent costly repairs and extend the lifespan of the vehicle.