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Discussion Starter · #1 ·
I have a 2012 lml and for whatever reason my turbo vanes are operating in a backwards order. At idle my turbo is wide open causing a high pitch whistle but as I speed up and do down the road it closes up. Never gets too low usually sits around 40% open going down highways and 90-96% open at idle. Was wondering if anyone else has had this problem. Have already replaced turbo sensor and solenoid. When I unplug the solenoid vanes run proper at idle but obviously won’t open when driving. Any ideas?
 

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What codes does your truck have?
 
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