OBD-II Diagnostic Scanner

Category: automotive

A tool that plugs into a vehicle’s onboard diagnostic port to read error codes and system data.

The OBD-II port is the "data door" to your car’s computer. A scanner translates the cryptic codes (like P0300) into human-readable descriptions, helping owners determine if they have a minor sensor issue or a catastrophic engine failure.

Common Examples

• AutoZone offers free OBD-II scanner checks to help customers diagnose why their dashboard warning lights are illuminated.
• Using an OBD-II scanner, we identified the P0420 code, confirming a catalytic converter efficiency issue.