On-board diagnostics - Wikipedia
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 …
What Are OBD-II Codes? A Complete Guide by Kelley Blue Book
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...
What Is the OBD-II Port [Working, History, and Uses]
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 …
On-Board Diagnostic II (OBD II) Systems Fact Sheet
Oct 10, 2023 · OBD II systems monitor various aspects of a vehicle’s performance using sensors and diagnostic equipment. These systems constantly collect data from different components, …
What Is OBDII? History of On-board Diagnostics (OBD) | Geotab
May 6, 2025 · An OBDII is, simply put, the second generation of an OBD or OBD I. The OBD I was initially externally connected to the console of a car, while the OBDII is now integrated …
From dongles to diagnostics, here’s all you need to know about …
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 …
OBD II Code Lookup • Vehicle Diagnostic Trouble Codes Search
With our free to use OBD II code lookup services you can find out what exactly is wrong with your vehicle and pinpoint what you or your mechanic needs to repair. On our website we offer a …
OBD2 Explained - A Simple Intro [2025] – CSS Electronics
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. …
Best OBD2 Scanners for 2026, Tested - Car and Driver
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 …
What is OBDII? Everything You Need to Know About On-Board …
Dec 26, 2025 · OBD-II, short for On-Board Diagnostics II, is the built-in system vehicles use to monitor engine operation and emissions while the car is running. It tracks performance …