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  1. 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 November 2025 …

  2. On-board diagnostics - Wikipedia

    OBD systems give the vehicle owner or repair technician access to the status of the various vehicle sub-systems. The amount of diagnostic information available via OBD has varied widely since its …

  3. What is OBD? What You Need to Know - AutoZone

    OBD-I refers to the first generation of on-board diagnostic systems, which featured proprietary connectors, hardware interfaces, and protocols.

  4. From dongles to diagnostics, here’s all you need to know about …

    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 as cars have …

  5. 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.

  6. 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, such as the …

  7. 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 of reasons, …

  8. 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...

  9. 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 scan tools over …

  10. 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. You've probably …