I would start by searching for a vacuum leak. At the front/bottom of the manifold there is a Solenoid Valve, it’s not easy to get too but with “small hands” and removing the front CF piece you should be able to check around first if the lines are connected or if you might hear a slight hissing..., anything else will involve taking that manifold off again... This valve solenoid is part of the immediate circuit that hooks up to 2 Intake Manifold flap drive units (under the manifold) and these are what open and close the arms.
The other possibilty just like Gary mentioned is that both your flap arm linkages broke as these are made of plastic and become weak over time, it has to be a pretty bad repair
Shop to break both and if you ever want to repair these, its a manifold off job and 034 in the US sells the parts. A tune in this case as suggested should resolve your issue as long as it codes out these error codes from happening.
On a separate note I’d ask the
Shop if they used loctite when they reinstalled the 16 (8x2) sideplugs that go on each side of the manifold as you don’t want the remote possibilty of one of these falling into one of your cylinders
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