Conditions for Setting the DTC
WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
P0071
During the first 20 s of run time after the 1 hour soaking period, the difference between the outside air temperature and the engine intake air temperature is greater than 30°C (86°F).
P0072
The ECM detects the sensor signal is more than 88°C (190°F).
P0073
The ECM detects the sensor signal is less than -40°C (-40°F).
P0074
The ECM detects an unrealistic signal variance.