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 ECM can report DTC P0141 failed, DTCs P0036, P0037, and P0038 must run and pass.
DTCs P0137, P0138, P0140, P2232, P2270, and P2271 are not set.
The engine is operating.
The ignition 1 voltage is between 10.5-18 volts.
The ECM internal sensing element resistance test is enabled.
The fuel system is not in a decel fuel shut-off.
The calculated ambient temperature is more than -7° C (20° F).
If the engine is operating and then the ignition is turned OFF, the engine must be OFF for at least 2 minutes before the next start-up for the diagnostic to run.
The calculated exhaust temperature is between 360-500° C (680-932° F).
DTC P0141 runs continuously once the above conditions are met for more than 1 minute and 40 seconds.