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Home >> Ford >> 1994 >> Explorer 2D Utility, 4WD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 16 (Engine Controls - Theory & Operation) >> Computerized Engine Controls >> Input Devices >> Barometric Pressure (BARO) Sensor

Barometric Pressure (BARO) Sensor

WARNING: This page is about a different car, the 1994 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.

BARO sensor measures barometric pressure of atmosphere. Variations in atmospheric pressure (changes in altitude) modify an electrical signal monitored by PCM. The BARO sensor input affects spark advance, EGR flow and air/fuel mixture adjustments by PCM. Sensor input is updated during key-on and wide open throttle applications. BARO sensor looks identical to Manifold Absolute Pressure (MAP) sensor.

NOTE: Tubing nipple on BARO sensor is open to atmosphere, while tubing nipple on MAP sensor is connected to intake manifold.
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