Camshaft Position (CMP) Sensor
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Ford RV Cutaway, 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 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, which 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 sensor produces a sine wave in response to the peg as it passes the sensor. The sensor output is required to determine the camshaft position.