Conditions for Running the DTC

WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

DTCs P0068, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, P0122, P0123, P0125, P0128, P0220, P0222, P0223, P0443, P0449, P0452, P0453, P0454, P0502, P0503, P0606, P0641, P0651, P0722, P0723, P2135 are not set.
The ignition voltage is between 11-18 volts.
The barometric pressure (BARO) is more than 70 kPa.
The fuel level is between 10-90 percent.
The start-up engine coolant temperature (ECT) is less than 35°C (95°F).
The start-up intake air temperature (IAT) is between 4-30°C (39-86°F).
The start-up ECT and IAT are within 8°C (14.4°F) of each other.
The purge solenoid valve is enabled.
DTC P0446 runs once per trip when the above conditions have been met.