KW590 is a Great Upgrade from the More Basic Auto Code Scanner Tool. The Major Function is Working on Vehicle Engine System. Once Plugged into Your Vehicle's 16pin OBDII DLC After Starting the Ignition, You Can Choose to Diagnostic What You Want to Know about Your Cars’ Engine System, Oxygen Senor, Evaporative Control System,etc, Then Find Out the Problems and Perhaps fix it. Product Description： KONNWEI KW850 OBDII/EOBD Scanner supports all 10 modes of OBDII test for a complete diagnosis. Featuring the unique patented One-Click I/M Readiness Key, TFT color display and built-in speaker, the AutoLink AL519 is truly the ultimate in power and affordability, allowing users to do their jobs faster. In addition, thousands of troubleshooter code tips help technicians to save diagnosis and repair time. Scanner Features & Functions: *Works on all 1996 and later OBDII compliant US, European and Asian vehicles *Easily determines the cause of the Check Engine Light ( MIL) *Retrieves generic (P0, P2, P3, and U0) and