Conditions For Running DTC

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

DTCs P0421 and P0431 are not set.

Engine load is 20 and 45 percent.
Manifold Absolute Pressure (MAP) sensor variation is less than 6 kPa.
Catalytic temperature is greater than 662°F (350°C).
Engine is in closed-loop fuel control.
Engine speed is 1000-2120 RPM.