Conditions for Setting the DTC
WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
DTC B0160 sets when the instrument panel cluster (IPC) detects that the temperature is greater than 190°F (88°C) for more than 2 seconds.
DTC B0161 sets when the IPC detects that the temperature is less than -40°F (-40°C) for more than 2 seconds.