What causes the VGT actuator to fail and HOW do I know if it’s just soot buildup?

JustOneMorePart

New member
My 2014 6.7L just threw the dreaded P00AF code and my exhaust brake has completely stopped working. The truck feels like a dog off the line. I’ve heard the actuators on these Holset turbos are notorious for dying.

Is there a way to clean the soot out of the sliding nozzle to save it, or am I looking at a $1,000 replacement part? I’m considering upgrading to a City Diesel or Fleece actuator instead of another OEM one—what’s the consensus on those?
 
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