SODIAL(R) Auto Car ELM327 OBD2 OBDII V2.1 CAN-BUS Bluetooth Diagnostic Interface Scanner Read/Clear MIL (Check Engine light): Check diagnostic codes yourself and make informed and money-saving repair decisions. Works on Windows and MacOS : Turn your laptop into a sophisticated diagnostics tool and performance analyst. Works on a wider range of vehicles: Our scanners advanced algorithm enables it to connect to more OBDII-compliant makes & models than most scan tools on the market.