Model X and S Refresh do have an OBD2 port. However, based on other posts here, it seems like the only way to hook up an OBD2 reader is by connecting a harness to the CAN bus under the main screen, above the wireless charging port. I wonder if there is any way to use the OBD2 port?? Why are the OBD2 dongles not working with the factory OBD2 port?