I'm not sure how it might help but i believe what your mechanic is talking about the the lever shown moving here at 30 seconds
I'm a new poster,and rather than start a new thread,I thought I'd continue on this one.
My 2009 LC200 diesel occasionally goes into "limp mode",usually when it is hot from running for a while,and after some effort,finally got the code P0046,which Toyota tells me is Turbo Actuator.It took me 3 months and 3 Toyota dealers and almost $700 to get this scant piece of information from Toyota ,the problem being that if the car sits for a while,the code goes away,so by the time I am towed to the Toyota Service centre,the code has cleared.Grrr!
Toyota tells me it about $3600 for a new turbo,and 20 hours labour to fit it at $143 per hour.
Of course I could take it to a turbo specialist,which could be less expensive...not sure what to do here.
If anyone has any feed back on this matter I would be very grateful,because ,to be honest,I'm not sure Toyota know what it is.My sense is that it probably the correct diagnosis,after much research,but it's a lot of money to spend to find out that ain't the problem.