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 …
Best OBD2 Scanners for 2025, 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 OBD? What You Need to Know - AutoZone
On-Board Diagnostics (OBD) is a system that monitors a car’s computer system and reports diagnostic trouble codes. Devices like an OBD-II code reader can read diagnostic trouble …
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 …
Best OBD-II Scanners of 2025, Tested & Reviewed - Road & Track
Sep 15, 2025 · That's where OBD-II scanners come in, giving enthusiasts and everyday drivers a window into their vehicle's diagnostic systems.
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 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 an OBD2 Scanner and How Does It Work? - MotorTrend
Aug 26, 2024 · Discover what an OBD2 scanner is and how to use it to diagnose and fix car problems before they escalate into major repairs. Your check engine light can come on a host …
9 Best OBD2 Scanners for DIY Troubleshooting in 2025
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 …
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. …