The camshaft position sensor on the 2003 Cadillac CTS 3.2-liter six-cylinder engine turns on one time for every revolution of the camshaft to tell the computer how the valve train is sitting relative to the position of the crankshaft. The computer uses information retrieved from the cam position sensor to assist in the timing of the fuel injectors. The cam position sensor is found on the front of the engine in the center of the bearing cap just below the intake manifold
Lift the vehicle hood and support it with the hood prop rod.
Disconnect the electrical connector from the camshaft position sensor pigtail by gently prying up on the tab with your thumb and pulling the connectors apart. Remove the knock sensor pigtail retainer.
Remove the securing male Torx bolt with the female Torx socket and ratchet from the camshaft sensor.
Gently pull the camshaft sensor out of its mounting hole in the bearing cap.
Spray brake cleaner on the shop rag and clean the mating surface on the camshaft bearing cap.
Set the camshaft position center into the camshaft bearing cap and secure it with the male Torx bolt. Tighten the bolt to 71 inch-pounds with the torque wrench.
Attach the knock sensor pigtail retainer by clipping it into place on the camshaft position sensor.
Plug the wiring harness into the camshaft position sensor pigtail. Shut the vehicle hood.
