Why do you need the MUCAR BT200/BT200 Pro? The MUCAR BT200/BT200 Pro code reader scan tools support full OBD2/EOBD test modes for the engine system. They can read and clear codes in all system diagnostics for almost all OBDII/EOBD vehicles, and live data stream in graph format is available for all these systems. In addition, the MUCAR BT200/BT200 Pro provides 15 maintenance knowledge bases for quick entry into auto repair work. Access 15 maintenance services, auto VIN technology, and vehicle performance tests with the MUCAR app.