Diagnostic Aids
WARNING: This page is about a different variant/trim than selected.
- The Intake Air Humidity sensor signal and the IAT sensor 2 signal are sent to the ECM on the same circuit. If the Intake Air Humidity parameter displays the value: 0% and there are also IAT sensor 2 DTCs, check for a circuit problem.
- The Intake Air Humidity Signal parameter displays the measured humidity within the air intake system and may differ from atmospheric humidity measured outside the air intake system.
- With the ignition ON, the engine OFF; if the engine is cold, a properly functioning humidity sensor will gradually increase the scan tool Intake Air Humidity Signal parameter. This is due to the heat that is generated by the sensor heating elements.