Conditions for Running the DTC

WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.

The engine coolant temperature (ECT) is between 10° C (50° F) and 20° C (68° F).
The intake air temperature (IAT) is between -9 to +36° C (14-97° F).
DTC P0128 runs once per drive cycle when the above conditions have been met.