Conditions for Running the DTCs

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 ECM can report that DTC P0133 or P0153 failed, DTCs P0030, P0031, P0032, P0050, P0051, P0052, P0135, and P0155 must run and pass.
DTC P0036, P0037, P0038, P0056, P0057, P0058, P0137, P0138, P0140, P0141, P0157, P0158, P0160, P0161, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0442, P0443, P0455, P0458, P0459, P2096, P2097, P2098, P2099, P2177, P2178, P2179, P2088, P2089, P2090, P2231, P2232, P2234, P2235, P2270, P2271, P2272, or P2273 is not set.
The engine speed is 1,240-2,400 RPM.
The fuel system is operating in Closed Loop.
The engine load is 17-50 percent.
The exhaust gas temperature is greater than 350°C (662°F).
The evaporative purge (EVAP) solenoid is commanded OFF, or commanded ON for greater than 10 seconds.
DTC P0133 and P0153 run continuously when the conditions above exist for approximately 400 seconds.