My 2016 has been kicking a P226C code randomly for the past few months. Finally took it to the local dealership and tech discovered sticking RTCV. The repair is replacement of the low-pressure turbo since the rotary valve is built into the turbo housing. The tech discovered this by disconnecting the actuator rod from the RTCV and attempting to move the valve itself which was extremely tough to do. It was so tight that when he reconnected it, he couldn't perform the required calibration, which meant rolling the dice to get it home. He suspected carbon build up which is not uncommon for this motor. I started it up and drove it locally to get the intake hot and maybe loosen the valve which worked well enough to perform the calibration and get it home. I have since sprayed PFTF lube onto the valve housing and linkage ball joint which seems to have loosened it a little. Just drove truck today for a few miles and no dead pedal or CEL. This all started when temps dropped so not sure if cold carbon is causing the binding or if that is just coincidental. From pics it looks like you can remove the valve, and maybe replace it, but to be honest, I'm looking for another truck. Tech commented parts are hard to find and expensive. Love how this truck drives, rides and pulls but I want some road confidence. And the aftertreatment on this truck is unreliable as well as extremely expensive. Too bad Cummins didn't choose a better turbo set-up because this truck would have been a home run. As for the high-pressure turbo and RTCV actuator, I believe this is specific to the 2016. Seems the turbos in that year had an oiling deficiency causing premature wear of the turbo and potentially sending shavings into the engine. I bought mine used and the high-pressure turbo had already been replaced.