Barometric Pressure Sensor: Description and Operation

Air Flow Sensor Location:

LOCATION

The barometric pressure sensor is located in the Air Flow Sensor (AFS).

PURPOSE

The Barometric Pressure Sensor measures atmospheric pressure and converts the measurement into a voltage signal which is sent to the ECM.

The ECM uses the voltage signal to adjust the air-fuel ratio and ignition timing for the altitude at which the vehicle is running, thus improving driveability at high altitude.