The presence of the OBDII allows telematics devices to silently process information such as engine revolutions, vehicle speed, fault codes, fuel usage and more.
Getting Started Guide: OBD-II Codes
Complete OBD2 Tutorial: Mastering Car Diagnostic Tools & Systems
OBD2 Codes List & Guide: Search Your Trouble Code - In the Garage with
Benefits & Types of OBD-2-Devices, On-Board Diagnostic System
GM On Board Diagnostics II Diagnosis and Repair Manuals Study Guide OBD II STG
How to Use a Code Reader for a Car - CARFAX
OBD2 Scanners: Do's and Don'ts of Using OBD2 Scanners
For car maintenance, are all OBD readers the same? - Quora
10 Of The Best Automotive Diagnostic Apps For Android
OBD I & II (On Board Diagnostic)
On-Board Diagnostics (OBD)