Conditions for Running the DTC

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Before the ECM can report DTC P0455 failed, DTC P0496 must run and pass.
DTCs P0106, P0107, P0108, P0116, P0117, P0118, P0120, P0121, P0122, P0123, P0220, P0222, P0223, P0442, P0443, P0449, P0451, P0452, P0453, P0454, P0464, P0496, P0608, P0609, P0641, P0651, P1516, P2101, P2119, P2120, P2122, P2123, P2125, P2127, P2128, P2135, P2138 are not set.
The ignition voltage is between 11-18 volts.
The barometric pressure (BARO) is more than 74 kPa.
The fuel level is between 15-85 percent.
The engine coolant temperature (ECT) is less than 35°C (95°F).
The intake air temperature (IAT) is between 4-30°C (39-86°F).
DTC P0455 runs once per cold start when the above conditions are met.