This is not your typical and i think its actually happening more and more, or now that we are aware of it we see it more.,

Here is what we had done to diagnose the issue,

• Scan And Record Fault Codes
  Pcm
  P0234 – Turbo Charger Over Boost Condition
  Abs
  Ecm And Tcm Invalid Data Codes
  Test Drive Vehicle And Found That The Fault Code Is Correct And That The Boost Pressure Is Going Too High
  Desired Valve Of: 17 Psi
  Turbo Is Hitting: 32 Psi
• Inspections
  Check Egr And For Other Accessories
  Found The Numbers All Look Good,
  Check Boost Sensor And Found To Be Relatively Clean
• Check Turbo And Turbo Actuator Rods And Control
  Found There Is No Reset For The Turbo Actuator And The Turbo Actuator Is Vacuum On Solenoid Type,
  Check The Operation Of The Vacuum And Found To Be Ok
• Reset Fuel Pump And Injectors
  Seeing As There Is No Reset Specifically For The Turbo Actuator Learning
  Clear The Learning Values For The Main Diesel Fuel Pump And The Pre Injection Learning.
  Carry Out Drive Cycle And Check That The Learning Is Complete,
  Found That During The Boost Levels Are Good And Not Going Wildly Above Desired Boost Pressure
• 2nd Drive Cycle
  Carry Out 2nd Drive Cycle And Check Turbo Operation
  Found Turbo Operation Follows The Desired,
  Desired Value: 17 Psi
  Turbo Is Hitting: 17.5 Psi
  And Regulated Is Just Below A Second Later ( No Wild Boost)
  The Vehicle Doesn’t Feel As Punchy Now,
  But The Vehicle Now Drives How They Should.