Make sure your bluetooth OBDII dongle is pairedThis app will interface with any Bluetooth OBDII dongle with quot;OBDIIquot; as its name, which is the majority of ELM 327 devices out there.This app provides a terminal to your dongle so you can perform ANY command. google quot;OBD commands wikiquot; for the list of commands.Common commands:quot;03quot; to read fault codes. The device will respond with quot;03 43quot; followed by your 4 digit fault code.quot;04quot; to erase fault codes and turn the MIL off.Further support for more dongles may be added. email me if you would like yours added.