On-board diagnostics - Wikipedia
Included in this system is a proprietary 5-pin ALDL that interfaces with the Engine Control Module (ECM) to initiate a diagnostic request and provide a serial data stream. The protocol …
What is OBD? What You Need to Know - AutoZone
Modern on-board diagnostic systems take a lot of the guesswork out of figuring out what's wrong with your vehicle. Learn how OBD works.
Tested: Best OBD-II Scanners for 2025 - Car and Driver
Aug 26, 2025 · We gathered several top-ranked OBD-II scanners and ran them through extensive testing to find the best for you.
OBD-Codes OBD-II Trouble Codes - DTC Codes Car Repair
A car repair resource site that helps you diagnose vehicle OBD, OBD-II, and OBD2 problems. We have many articles on how to diagnose and repair many check engine light codes.
Best OBD2 software | Free | For laptop/PC - OBD Planet
What is OBD2 software? OBD stands for “onboard diagnostics,” and is a protocol included in all modern vehicles. OBD2 software lets you access and interpret the data from your vehicle’s …
Mastering Your OBD II Scanner: A Step-by-Step Guide on How to ...
Aug 22, 2024 · From understanding the basics of OBD II technology to interpreting diagnostic trouble codes (DTCs) and performing advanced troubleshooting procedures, this article will …
On-Board Diagnostic Test Reference - Bureau of Automotive Repair
This reference information provides both a summary of pass/fail standards for the On-Board Diagnostic (OBD) test portion of a Smog Check inspection and instructions for inspecting …