Conditions for Running the DTC

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.

DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, P0220, P0502, P0503, P2135 are not present.
The start-up ECT is less than 70°C (158°F) when the intake air temperature (IAT) is more than 10°C (50°F).
OR

The start-up ECT is less than 50°C (122°F) when the IAT is between -7 and +10°C (+19 and +50°F).
The fuel ethanol is less than 85 percent.
The IAT sensor parameter is between -7 and +55°C (+19 and +131°F).
The engine run time is between 90-1,370 seconds.
The vehicle speed is more than 8 km/h (5 mph) for more than 2.5 km (1.5 miles).
The mass air flow (MAF) is between 20-75 g/s with the average more than 10 g/s.
DTC P0128 runs one time per drive cycle when the above conditions are met.