I just recently installed my MM3 tuner on my 2018 2500.

I cannot seem to use my rt tunes as it keeps showing error code 14000.

I unplugged and replugged everything and still nothing.

Also the tuner doesn't sense truck is turned on after its been turned off and turned on again.

I would have to unplug it from the OBD port and replug it to work normally.

Anyone can help me here?

First time using this tuner.