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Message: [QUOTE="Strokersace, post: 1513086, member: 622"] Not sure what I have going on with my Mini Maxx. Bought it used on here a year or 2 ago. Been installed with custom tuning since November of 2017 and around 10,000 miles since complete engine build. I did not try to update this unit when I got it. Just put MCC custom tunes on it and rocked out! Driving a few weeks back, I got to where I was going and noticed my gauges on the MM were "stuck" and not adjusting (egt was still showing 650 at idle). Shut truck off, attended the meeting, truck started back up fine, but noticed when I got on the highway, I had a roaring "freight train" noise at speed. Sounded like the engine was reving much higher than what it actually was. Pulled off and as I was slowing down I noticed the gauges on the MM were frozen again. Check engine light came on briefly as I was slowing. Once stopped, I tried pulling codes on the Mini and it was locked up. Couldn't adjust tunes, access menu, nothing. Shut truck off and it would not restart. Dead in water. I checked the key on power, fuses, everything. After fiddling with the obd-II plug, I was able to get the Mini Maxx to reconnect and pulled codes and cleared codes. Codes were: U0073 - Control module communication Bus A off U0115 - Lost communication with ECM/PCM "B" U0155 - Lost communication with instrument panel After clearing them, truck started up fine. Gauges all read fine. Got back on highway about 1 mile later the freight train noise came back and Mini Maxx froze. You guessed it, Rinse and Repeat! This time when I got everything going enough to clear codes, I unhooked the Mini Maxx from the HDMI able complete. Had ZERO issues the rest of the way home and over the next week of driving it. Then the other day, sitting in my driveway, I plugged the Mini back in. As soon as id start the truck, the Mini would work correctly for maybe 5 seconds, then freeze. Truck wouldn't restart. Tried same tricks I did before and no luck. Used my other code reader to check and clear codes. Same exact codes as before. So I left the Mini unplugged and in the console. Truck seems to be running fine with no issues so long as the MM is unhooked. The only time I had the CEL was when it flashed that 1st time. What the heck could be going on with it? I really like having my gauges! And the ability to shift between tunes. [/QUOTE]