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The OBD2 port is a standardized diagnostic connection that allows mechanics and scan tools to communicate with your vehicle’s computer system. By plugging into this port, technicians can read trouble codes, monitor live sensor data, and diagnose engine or emissions problems. This article explains where the OBD2 port is located and how it helps identify vehicle issues.

What Is an OBD2 Scan Tool and How Use It? The small tool that lets you diagnose your cars check

Help, My Car failed the Smog Check — Now What Do I Do? So, your car failed the smog check;