Condition 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 P0420 or DTC P0430 failed, DTC P0442 must run and pass.
DTCs P0030, P0036, P0050, P0056, P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0133, P0135, P0137, P0138, P0139, P0141, P0153, P0155, P0157, P0158, P0159, P0161, P0171, P0172, P0174, P0175, P0201-P0206, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0335, P0336, P0341, P0401, P0403, P0404, P0443, P0496, P0501, P0641, P0651, P0720, P1128, P1129, P2227, P2228, P2229, P2297, P2298, P2413, P2414, P2415, or P2646 are not set.
The engine coolant temperature is more than 69°C (156°F).
The intake air temperature is more than -21°C (6°F).
The estimated TWC temperature is more than 500°C (932°F).
The engine speed is between 1,150-2,000 RPM.
The manifold absolute pressure (MAP) is between 22-74 kPa.
The vehicle speed is 7 km/h (4 mph) or more.
The engine is in closed loop.
DTC P0420 and DTC P0430 run once per drive cycle when the above conditions are met.