P0AF0, P0AF5, P0BD4, P0BD9, P0BDE, and P0BE3
WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The inverter phase temperature sensor is less than -40°C (-40°F) for 3 seconds.