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Bluetooth OBD

2243 Views 6 Replies 6 Participants Last post by  canehdian
I have a 2011 Volt. Quite a while ago I read somewhere that if you use a bluetooth OBD device and leave it plugged in all the time, you will not be able to use Onstar as far as vehicle status and/or remote key fob commands. Is this true? Something about the car can only use one communication device at a time, like OBD and Onstar. I do have an Onstar subscription so I can get charging status updates and start my car remotely, I live in Phoenix and is nice to start it 10 minutes before I leave work.
If I can use both Onstar for the above mentioned features AND an OBD device, which android app is the best for monitoring the Volt systems?
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Onstar functions work normally, but will not work for diagnostics (including the monthly email).
Presumably this is because the ECU will not allow more than one OBD2 connection at a time, and your bluetooth device is already active when powered on.
I get my monthly diag with mine plugged in.
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