Conditions for Running the DTC

WARNING: This page is about a different car, the 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

Before the ECM can report DTC P0133 failed, DTCs P0101, P0102, P0103, P0121, P0122, P0123, P0221, P0222, P0223, P0336, P0338, and P2237 must run and pass.
DTCs P0442, P0443, P0446, P0455, P0458, and P0459 are not set.
The HO2S is at operating temperature.
The fuel trim is enabled.
The HO2S is between 0.94-1.06 lambda.
The engine speed is between 1,520-2,240 RPM.
The volumetric efficiency is between 15.8-50.3 percent.
The change in volumetric efficiency is less than 3 percent.
The long term fuel trim correction is active.
DTC P0133 runs continuously once the above conditions are met.