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.
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