Conditions for Running the DTC: P0128

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

DTCs P0101, P0102, P0103, P0112, P0113, P0117, P0118, P0502 or P0503 are not present.
The startup ECT is less than 75°C (167°F).
The intake air temperature (IAT) is more than -7°C (+19°F).
The engine run time is between 30-1,800 seconds.
The vehicle is driven more than 0.8 kilometer (0.5 mile) at more than 8 km/h (5 mph).
This diagnostic runs once per ignition cycle when the above conditions are met.