Conditions for Running the DTCs

WARNING: This page is about a different car, the 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

P0234

DTCs P0236, P0237, or P0238 are not set.
The driver requested boost pressure level exceeds the level of the base boost pressure.
This DTC runs continuously within the enabling conditions.

P0299

DTCs P0236, P0237, P0238, P0243, P0245, P0246, P2227, P2228, or P2229 are not set.
The BARO is greater than 65 kPa.
The engine speed is between 2,600-3,120 RPM.
The ECM is not in limp home mode.
The ECM is not in limp home mode with safety fuel cut-off activated.
The driver requested boost pressure level exceeds the level of the base boost pressure.
This DTC runs continuously within the enabling conditions.