Camshaft Position (CMP) Sensor
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2007 Ford RV Cutaway, 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.
The CMP sensor is a variable reluctance sensor that responds to a rotating trigger protruding from the camshaft. The trigger is a single 9.525 mm (0.375 inches) diameter peg approximately 18 degrees wide, projecting 3-5 mm (0.12-0.20 inches) from the camshaft. The peg passes the sensor once per camshaft revolution and produces a single pulse. The camshaft speed is calculated from the frequency of the CMP sensor signal. The engine does not operate without a CMP signal.