Conditions for Setting the DTC
The ECM does not detect a difference of 3°C (5°F) between the previous ignition cycle intake air temperature (IAT) and the start-up intake air temperature (IAT) of the next ignition cycle.
Or
The ECM does not detect an intake air temperature (IAT) change of more than 3°C (5°F) for 2 seconds during the Idle/Cruise test.