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P0299 Underboost


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Getting an intermittent underboost issue, flashing glow plugs light and eml. EGR checked and not an issue, the turbo boost pressure converter seems to be the problem. Getting constant vacuum in, but intermittent vacuum out, which triggers the lights on the dashboard. I have been trying to source the part but it's like trying to find hens teeth. Any suggestions or help would be greatly appreciated. 

Part number is 8KO906627 (pic below, if I manage to attach) IMG20230318164325.thumb.jpg.1d1c3efe2752979722cd622151dcccc2.jpg

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