Barometric Pressure (BARO) Sensor - 7.3L Di Diesel Only

WARNING: This page is about a different car, the 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, 2003 Ford Excursion, and 2003 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

The Barometric Pressure Sensor (BARO) Sensor operates similarly to the Manifold Absolute Pressure (MAP) Sensor.
It measures barometric pressure instead of intake manifold pressure.
The Powertrain Control Module (PCM) uses the signal from the BARO Sensor to determine the altitude at which the vehicle is operating.
The PCM then adjusts the transmission shift schedule and EPC pressure for the altitude.