how do you fix the 2262 code on 6.7l cummins

Question

Lose of power,  back firing, white smoke , power  will increase after several minutes  as the engine warms up and it will run normally

Answer 1

P2276 Turbocharger boost pressure not detected - mechanical
The exhaust regeneration has that been performed before you do the step of the turbo charger boost actuator? What set this is when it is unable to move, other than that this is the turbo actuator.