Conditions for Setting the DTC

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

P0A38

Sensor output voltage less than 0.2 volt for 1 second.
Temperature is greater than 215°C (419°F) for 1 second.

P0A39

Sensor output voltage greater than 3.95 volts for 1 second.
Temperature is less than -20°C (-4°F) for 1 second.