MUCAR CS90 OBD2 scanner Car diagnostic tool Engine systems Oil reset tools. 1 MUCAR CS90 Host. You can diagnose the engine system via ecu obd2 port, support all 10 OBDII test modes, such as live data, O2 sensor test, component test and more;read and clear the engine error codes, find out the exactly problem, repair it, and turn off the MIL engine light.
