Trouble code P0234 and the Engine runs perfect when the light is off and takes a on 2008 Volkswagen Jetta

couple days to come back on. I would like the #1 Problem

1 answer 2 comments
TURBO CHARGE OVER BOOST. SEEK DIAG
Does that mean the Turbo is Ok because the car runs fine when the light is Reset and goes like Hell and then goes into limp mode when the light comes on, Is it the Turbo control valve or what. Tell me your gut Feeling! Thanks
diag has to be done to be sure. it maybe turbo sensor or other isssues