This EOBD/OBD II Engine Fault Code Reader from Clarke is an essential automotive service tool, suitable for professional or home diagnostic use. Simple to use, the fault code reader simply connects to the vehicle's ECU (Engine Control Unit) via the diagnostic link connector, allowing you to access and retrieve important engine performance data and diagnostic date to pin point any issues that may require attention. Featuring a easy to read LED display and USB Cable for fast, hassle free software upgrading. Key Features: Retrieves, Reads and Displays DTC Fault codes and then clears them - Data Stream Function for viewing and analysing live data - Freeze frame data facility records a snapshot of data when an emission fault occurs - Displays I/M readiness status and retrieves VIN.