On-board diagnostics (OBD) is a term referring to a vehicle's self-diagnostic and reporting capability. In the United States, this capability is a requirement to comply with federal …

Modern on-board diagnostic systems take a lot of the guesswork out of figuring out what's wrong with your vehicle. Learn how OBD works.

May 19, 2025 · Curious what OBD stands for in cars? Learn what On-Board Diagnostics means, how it works, and why it’s essential for vehicle maintenance.

OBD (On-Board Diagnostics) is an electronic monitoring system used in modern vehicles to track performance, capture faults, and help mechanics identify problems.

Apr 25, 2023 · OBD stands for On-Board Diagnostic. It’s the standardized system that allows external electronics to interface with a car’s computer system. It has become more important …

OBD systems monitor emissions to ensure that vehicles meet minimum requirements at all times. They also alert users when emissions exceed acceptable limits so that the issue can be …

Jul 19, 2025 · OBD stands for On-Board Diagnostics, a built-in computer system in vehicles that monitors engine performance, emissions, and other critical systems. It logs Diagnostic Trouble …

Dec 5, 2025 · On-Board Diagnostics, commonly known as OBD, revolutionized how we maintain and repair vehicles. These systems monitor vital engine and emissions functions, providing …

OBD stands for “ O n- B oard D iagnostics.” It is a computer-based system originally designed to reduce emissions by monitoring the performance of major engine components.

Do you know what those fault codes displayed on your vehicle’s on-board diagnostics system mean? Check out our guide to OBD-II codes.