What is an OBD scanner? OBD stands for "on-board diagnostics." It connects to your car's computer system and can read its internal codes to diagnose its mechanical and electronic ills.

Did your vehicle's check-engine light just pop on? An OBD-II scanner can provide some direction. We tested a handful to find the best for different situations.

From the main menu, select Diagnostics, and after syncing with car’s computer the scanner will display these trouble codes.

Car Diagnostic Test Overview A car diagnostic test is a digital analysis of your car’s computer systems and components. The test scans components and systems to check for issues with the engine, ...