What’s the feature of obd diagnostic tool for internet of vehicles (IOV)? In order to make reader get the point easily, we hereby make a comparison for ordinary Bluetooth OBD2 code reader and OBD diagnostic tool for IOV. They are mainly different in hardware, software, data transmission and function. In general, ordinary trouble code reader is simple and auto diagnostic tool for IOV is more complicated. DTC code reader is mainly for personal and DIY application. But obd-ii diagnostic tool is for special application and centralized management. Bluetooth trouble code reader is with short transmission distance but IOV diagnostic tool is for remote use. Mini obdii code reader is with simple function and IOV vehicle diagnostic tool is with various functions.