I have a 2016 3500 with mm3 from DRD.

I keep getting code 14000 if I try to do anything with the real time tuning so I gave up on that.

Also it will not turn on with the truck I have to wait for the truck to be on a minute then unplug the obd2 once or twice and it will work at that point.

Also it will not let me clear dtc codes.. it says turn key to on so I do but it does not register that the key is on and times out before it will register.

I have unplugged every cable and made sure they were clean and in good condition but still nothing.

Any help would be greatly appreciated.