Conditions for Running the DTC

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.

Before the PCM can report that DTC P0455 failed, DTC P0496 must run and pass.
DTCs P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, P0125, P0131, P0132, P0133, P0134, P0135, P0136, P0137, P0138, P0140, P0141, P0151, P0152, P0153, P0154, P0155, P0156, P0157, P0158, P0160, P0161, P0220, P0442, P0443, P0449, P0451, P0452, P0453, P0454, P0464, P0496, P1111, P1112, P1114, P1115, P1125, P2135 are not set.
The engine is running.
The ignition voltage is between 10-18 volts.
The barometric pressure (BARO) is more than 75 kPa.
The fuel level is between 15-85 percent.
The engine coolant temperature (ECT) is between 4-65°C (39-149°F).
The intake air temperature (IAT) is between 4-75°C (39-167°F).
The start-up ECT and IAT are within 9°C (16°F) of each other.
DTC P0455 runs once per cold start.