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Re: P259F turbo boost problems and how diag accurately?
Posted to Technical Discussion Forum on 10/28/2023 1 Reply

This code sets when the actual VGT duty cycle is outside of a normal threshold for desired boost levels. To check for a VGT sticking, set engine to fixed RPM, command EGR closed and actuate VGT open and closed while watching for a change in MGP and EBP.

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