An OBD2 scanner is a diagnostic tool that connects to a vehicle’s onboard computer to read error codes and monitor performance data. It helps identify issues with the engine, emissions, transmission, and other systems by interpreting standardized codes. Ideal for DIY enthusiasts and professionals alike, OBD2 scanners range from basic code readers to advanced models with live data and graphing features. Using one can save time and money by pinpointing problems before visiting a shop. Most vehicles made after 1996 are OBD2-compatible. Simply plug the device into the diagnostic port, turn on the ignition, and follow on-screen prompts. Regular use promotes proactive maintenance and ensures your vehicle runs efficiently and safely.