Conditions for Running the DTC

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

Before the PCM can report DTC P2176 failed, DTC P0122, P0123, P0222, P0223, P2100, P2108, P2135, and U0107 must run and pass.
The ignition is ON.
DTC P2176 runs once per drive cycle when the above conditions are met.