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 emissions standards to …
Best OBD2 Scanners for 2025, Tested - Car and Driver
4 days ago · 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 with …
What is OBD? What You Need to Know - AutoZone
OBD-II is a more standardized version of this system, making it easy to diagnose issues across different vehicles. The standardized OBD-II system eliminates the necessity for multiple adapters and scanner …
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 …
Everything You Need To Know About OBD, OBD II - Digital Trends
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 new car …
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 …
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 within the …
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, …
OBD2 Explained - A Simple Intro [2025] – CSS Electronics
In this guide we introduce the On Board Diagnostic (OBD2) protocol incl. the OBD2 connector, OBD2 parameter IDs (PID) and the link to CAN bus. Note: This is a practical intro so you will also learn how …
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.