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 emissions standards to …

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.

Nov 19, 2025 · Did your vehicle's check-engine light just pop on? An OBD-II scanner can point you in the right direction—and potentially save you a bundle. This article was updated in November 2025 …

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

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 addressed and …

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.

In response to this, modern alternatives have been developed including WWH-OBD (World Wide Harmonized OBD) and OBDonUDS (OBD on UDS). Both seek to streamline and enhance OBD …

Mar 3, 2025 · That's where Onboard Diagnostics (OBD2) comes in. OBD2 is a system that allows your car to communicate with you about potential faults. In this guide, we'll break down how OBD2 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.

Jun 2, 2025 · OBD stands for On-Board Diagnostics, a standardized system built into vehicles to monitor and report data from various vehicle subsystems. It allows mechanics and even car owners to …