I thought to share this experience I had today. I got one of those OBDII Bluetooth (mini ELM327) scanner tools from eBay (about $12) to use with Torque app. For those who don't know what I'm talking about, Torque Pro/Lite is one of the best car performance/diagnostic app/tools to pair up with such OBDII scanner that functions on par with $3k pro tools used in auto shops You get all the error codes from your car, can clear it easily, and get detailed diagnostics of your car performance. To make long story short, the first OBDII scanner I got was defective, while the second one from Amazon ($24) came working great.

The problem is that once you pair up one Bluetooth OBDII device, it shows up under the same "OBDII" ID name for a replacement device. When you go into BT setup menu and click on Tools icon to "un-pair" it, it disconnects but doesn't delete the device. When I plug a new device in and Scan for it, it find the device under the same "OBDII" name and connects it, but it still has the old device ID number from original device and as a result Torque wasn't able to communicate with it.

Took me a little while, but finally I was able to figure out how to delete that unwanted device. Once you un-pair it you need to reboot your phone, comeback to Bluetooth setup menu and do a fresh scan to acquire a new hardware BT device. That is the only way to do a clean delete if you want to replace it with another scanner that has the same name.

Btw, if anybody using Torque and has some tips/suggestions, I would appreciate it since I'm new to it myself.