Camshaft Position (CMP) 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.
On the 7.3L DI diesel engines, the CMP sensor provides engine RPM information to the Powertrain Control Module (PCM). This RPM input is used to determine shift scheduling and EPC pressure.