Conditions for Running the DTC

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

P0128

Before the ECM can report DTC P0128 failed, DTC P0100, P0101, P0102, P0103, P0117 P0118, P0119, P0335, and P0336 must run and pass.
The ECT is colder than 89°C (192°F).
The vehicle speed is greater than 15 km/h (9 mph).
The engine speed is greater than 920 RPM.
The air flow coming into the engine has accumulated to greater than 2,002 grams.
The startup ECT is colder than 70°C (158°F).
The intake air temperature (IAT) is warmer than -30°C (-22°F) and colder than 70°C (158°F).
DTC P0128 runs once per ignition when the above conditions have been met.