A3 8p P0299 turbo underboost

Marty92

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Hi guys, new to this forum.

I have an 06 plate A3.

Lately it has been going in to limp I suppose, for a while MIL was on and the other morning it was due to go in to Audi for diagnosing, sure enough on route no issues and MIL went off mid drive.

I took it in anyway but short of the error code they couldn't reproduce the issue or tell me much else.

Today, still no MIL but it did go in to limp, as you might expect restarting restores normal functionality.

The EGR was replaced last week, obviously not the cause but it was faulty nonetheless.

No smoke and no obvious lack of pressure from the turbo.

Any ideas?