The 1st time it happened, I've had my Pedal commander from the summer of 2018 with no issues until late October of 2019. I left work, drove a half mile to the liquor store, medicinal purposes only, then got right onto the highway. less than 1000 ft the truck goes into limp mode due to a throttle fault, I was in the left lane on a 3 lane highway with 65 mph limit and most are doing 80 mph & limp mode locked me in 3rd or 4th gear ( can't remember which now) and couldn't go faster than 40mph, almost got hit trying to get to the shoulder, I pulled over, turned off engine & restarted, pulled back out onto road and instantly got the fault. pulled back over, disconnected the pedal commander, restarted and back onto road, no issues getting home but I recall having a CEL light. Code pulled gave something like a throttle overvoltage or out of range, I don't recall since it's been months. I was too busy back then to F with it and didn't want to take a chance of being stranded in freezing cold or 2 ft of snow, which never happened due to warm winter, & have left it off for the winter.
I tried it twice in the following months and had it go into limp mode 2 more times over that period, luckily driving local roads, not highway. Almost got rear ended in those local episodes too.
I won't put it back on.