Conditions for Setting the DTC

P0071 

During the first 20 s of run time after the 8 hour soaking period, the difference between the outside air temperature and the engine intake air temperature is greater than 15°C (27°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.