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p 2121

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Recently In the past month I have thrown the P 2121 Code 4 times. Everytime it happens it is on my dsg high idle. I believe either my high idle is bad or else the connection is bad that was made. Does anybody know how to reach DSG? Everytime I call I can't get through, or they don't return E-mails. Do any of you have anythoughts on why the truck is doing this?
 
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