Conditions for Running the DTC

WARNING: This page is about a different car, the 2004 Buick Rendezvous. 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 failed, DTC P0443, P0451, P0458, and P0459 must run and pass.
DTCs P0030, P0031, P0032, P0036, P0037, P0038, P0101, P0102, P0103, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0130, P0131, P0132, P0133, P0135, P0137, P0138, P0221, P0222, P0223, P0443, P0446, P0449, P0451, P0452, P0453, P0458, P0459, P0496, P0498, P0499, P0506, P0507, P0560, P0562, P0563, P0700, P167A, P2122, P2123, P2127, P2128, P2138, P2177, P2178, P2179, P2179, P2187, P2188, P2189, P2190, P2177, P2178, P2187, P2188, P2195, P2196, P2232, P2237, P2243, P2251, P2270, P2271, P2297, and P2626 are not set.
The ignition 1 voltage is between 10.5-18 volts.
The fuel system is operating in closed loop.
The engine is idling.
The ambient air temperature (AAT) is between 2-32° C (36-90° F).
The start-up engine coolant temperature (ECT) is within 10° C (50° F) of AAT.
The FTP is between -18.7 and +7.5 mm Hg (-10 and +4 inches H2O).
The volumetric efficiency is less than 35 percent.
The barometric pressure (BARO) is more than 68 kPa.
The fuel level is between 12-88 percent.
The vehicle speed sensor (VSS) is less than 2 km/h (3 mph).
The engine is operating for more than 16 minutes or the long term fuel is stable.
DTC P0455 runs once an ignition cycle. The ECM will attempt to run this diagnostic up to 10 times an ignition cycle.