Bluetooth OBD

2243 Views 6 Replies 6 Participants Last post by canehdian, May 15, 2017

leppard3

Discussion Starter · May 14, 2017

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?
Thanks

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canehdian

· #5 · May 14, 2017

telveer said:
I had an OBDII BT adapter plugged into my 2013 Volt from day one. It is plugged in all the time. The only time I unplug is when I give it for service, or when I need OnStar to run remote diagnostics on demand (they will not be able to connect for on-demand Remote Diagnostics if the OBD2 port on drivers side is plugged in). OnStar remote link web/app works fine (remote start/stop, vehicle location, charge status, etc)

+1
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.

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canehdian

· #7 · May 15, 2017

I've received the email in the past, but it said unable to connect or similar error message in the actual body of it. YMMV

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