Conditions for Setting the DTC
WARNING: This page is about a different car, the 2018 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
P0234
The ECM detects that the actual boost pressure is greater than the desired boost pressure by a calibrated amount for greater than 3 s.
P0299
The ECM detects that the actual boost pressure is less than the desired boost pressure by a calibrated amount for greater than 3 s.