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Gary
Gary, ASE Certified Technician
Category: GM
Satisfied Customers: 737
Experience:  Senior Technician
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Loss of boost from turbo. had it on diagnostics and was told

Customer Question

Loss of boost from turbo. had it on diagnostics and was told vane position not learned code came up. Have checked all pipes, no leaks, checked egr and it is moving free.
JA: How old are the hoses? And what driving conditions do you most often encounter? The GM Mechanic's require payment for their services. It's way less expensive on JustAnswer than face-to-face would cost.
Customer: Most original from manufacture of car. As I said no splits or cracks in pipes. Usually shorter journeys.
JA: What year is your Turbo?
Customer: 2009
JA: Are you fixing your Turbo yourself? What have you tried so far?
Customer: I have had it at mechanic who plugged it in to snap on diagnostics computer.
JA: Anything else you want the mechanic to know before I connect you?
Customer: Zero boost from turbo
Submitted: 3 months ago.
Category: GM
Expert:  Gary replied 3 months ago.

Hi there,

Your mechanic needs to check if the VNG vanes are jammed up in the turbo, from soot.

I would also see if the learn procedure can be carried out.

Gary

Customer: replied 2 months ago.
Unfortunately the turbo itself was broken. I would like a refund. If I had spoken to a mechanic face to face with the information I had given you he may well have said the same but a chat with a mechanic is usually free. I have paid £22. I had no idea it would cost this much. I thought maybe £10 at most. I don't think it's worth £22.
Expert:  Gary replied 2 months ago.

Hi again,

That is usually what the final diagnosis is, to replace the whole unit.

Most of the time, the VNG vanes are jammed up, and no boost occurs.

Many mechanics will just replace the whole lot.

Glad you have it sorted now.

Kind regards

Gary

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