FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
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Barometric Pressure Sensor: Description and Operation


Barometric Pressure Sensor:





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