ISX 15 code spn 641 fmi 11

[farmtrucknw]

Have a 2016 Prostar with ISX 15 400ST, bone stock and have been getting this code thrown erratically lately. Truck seems to run fine and when it throws I will get the triangle on the dash warning engine light. Cycle the key and it goes away. What do I need to be looking for on this? Turbo actuator on the way out or spotty connection on the actuator harness? Truck has 492k miles on it.

Thanks.