Conditions for Running the DTC: P2227

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

Before the ECM can report DTC P2227 failed, DTCs P0100, P0101, P0102, P0103, P0121, P0122, P0123, P0221, P0222, P0223, P2228, and P2229 must run and pass.
The engine is operating for greater than 20 seconds.
The mass air flow is greater than 11 g/s.
The difference between the calculated manifold absolute pressure (MAP) and BARO pressure is less than 1.0 kPa for greater than 3 seconds.
The evaporative emission (EVAP) leak test is not enabled.
DTC P2227 runs continuously once the above conditions are met for 2 seconds.