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 …

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 …

OBD-II codes alert you when your car is having issues – everything from airbags to brakes. The most common place to access them is through the OBD-II port under your vehicle’s steering …

Jul 23, 2025 · OBD-II (On-Board Diagnostics, Second Generation) is a vehicle monitoring system that tracks the performance of the engine, transmission, and other critical components. It uses …

Sep 15, 2025 · That's where OBD-II scanners come in, giving enthusiasts and everyday drivers a window into their vehicle's diagnostic systems.

Apr 25, 2023 · Known as OBD II, that standard was implemented for the 1996 model year and is still in use today. Previous iterations of OBD were retroactively classified OBD I. Virtually every …

Here are the best OBD-II scanners you can buy right now, based on our own hands-on testing. You can scroll down the page to find more in-depth information about each mode, and what …

OBD2 is your vehicle's built-in self-diagnostic system. It is a standardized protocol that allows extraction of diagnostic trouble codes (DTCs) and real-time data via the OBD2 connector. …

Mar 3, 2025 · Learn about OBD2, how it works, its compatibility, and how to read trouble codes. Discover the benefits of onboard diagnostics (OBDII) for car maintenance and repairs.

Jul 18, 2025 · Automotive OBD2 scanners and car code readers are the easiest and least expensive ways to find out why your engine light is on and get it to turn off. I’ve used dozens of …