Conditions for Setting the DTC: P0A01
WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
The ECM detects that the temperature difference between the generator control module temperature sensor parameter and the ECT sensor is greater than 30°C (54°F).