Hi, Breaking off from this thread, my two ODBii scanners both exhibit the same issue. One is a wifi reader that connects to my phone. The phone connects to the reader no problem, but I get error messages that it cannot read the interface. The other is a handheld reader, again it gets powered up, but can't detect the correct protocol. It has worked in the past... Any idea why my ODBii port might power the devices, but not connect?