P0711 - Fail Case 2

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

The Trans. Fluid Temp. parameter is between 129-170°C (264-338°F).
The Trans. Fluid Temp. parameter has changed by less than 2.0°C (3.6°F) in 100 seconds.
The ECT is greater than 70°C (158°F).
The ECT has increased by 55°C (99°F) since startup.