Conditions for Running the DTC

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

P2227

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 ignition is ON or the engine is operating.
DTC P2227 runs continuously once the above conditions are met.

P2228 or P2229

The ignition is ON or the engine is operating.
The DTCs run continuously once the above conditions are met.