Feedback voltage looked ok on this one .Couldn't find any relearn on IDS for turbo actuator , reset all learning that I could find dyno tested the car produced normal power and torque . Customer described that the car was under powered at the lower end so gave it an extended road test. Seemed fine on the road and the fault didn't re occur . Customer now has car back will wait and see what happens. My suspicions are with EGR or turbo vanes possibly stuck or sticking .
Thanks for the replies Clive