Conditions for Running the DTC

WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.

Before the engine control module (ECM) can report DTC P0455 or DTC P0497 failed, DTCs P0443, P0450, P0451, P0452, P0453, P0458, and P0459 must run and pass.
DTC P0100, P0101, P0102, P0103, P0111, P0112, P0113, P0116, P0117, P0118, P0119, P0128, P0443, P0446, P0449, P0450, P0451, P0452, P0453, P0458, P0459, P0496, P0498, P0499, P0560, P0562, P0563, P0700, P2122, P2123, P2127, P2128, P2138, P2227, P2228, or P2229 is not set.
The ignition voltage is between 10-18 volts.
The engine run time is greater than 10 minutes or the long term fuel trim is stable.
The fuel tank pressure is between -18.7 and +7.49 mm Hg (-10 and +4 in H2O).
The Closed Loop fuel control is enabled.
The engine is idling.
The barometric pressure (BARO) is greater than 68 kPa.
The fuel level is between 11-88 percent.
The ambient air temperature (IAT) is between 2-32°C (36-90°F).
The engine coolant temperature (ECT) is within 10°C (18°F) of the ambient air temperature at engine start.
The vehicle speed sensor (VSS) is less than 3 km/h (2 mph).
The above conditions are met for greater than 30 seconds.
DTC P0455 or DTC P0497 will attempt to run up to 10 times or until the test completes successfully once per ignition cycle.