Airflow Sensor

Incorporated in airflow sensor assembly, airflow sensor is a Karmen vortex-type sensor which measures intake airflow rate. Intake air flows through tunnel in airflow sensor assembly. Airflow sensor transmits radio frequency signals across direction of incoming airflow, downstream of vortex. Intake air encounters vortex, causing turbulence in tunnel.

Turbulence disrupts radio frequency, causing variations in transmission. Airflow sensor converts frequency transmitted into a proportionate electrical signal, which is sent to ECU.