Barometric Pressure Sensor: Description and Operation

Barometric Pressure Sensor Circuit:

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

The ECU uses the voltage signal to adjust the air-fuel ratio and ignition timing as altitude changes, thus improving driveability at high altitude.

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