Vehicles equipped with Auto Start/Stop
WARNING: This page is about a different variant/trim than selected.
- The ECM enables the MAF sensor only during engine run mode by grounding the MAF control circuit via a solid state devise called a driver.
- With the MAF Sensor Supply Voltage commanded ON with a scan tool, when the engine is cold and not running, a properly functioning IAT sensor 1 will gradually increase the scan tool IAT Sensor 1 parameter. This is due to the heat that is generated by the multifunction intake air sensor heating elements when the MAF is enabled.