The function of the camshaft position sensor is to identify the position and speed of the camshaft and transmit this information to the engine control module (ECM) or powertrain control module (PCM). This data is then used by the ECM or PCM to precisely determine the camshaft's location, enabling the engine to regulate the timing of the fuel injection and ignition systems.

Additionally, the camshaft position sensor has the capability to identify engine issues by detecting any anomalies in the camshaft's rotation. If the sensor detects that the camshaft is rotating at an incorrect speed or if there is a timing issue, it will activate a fault code that will light up the engine warning light on the dashboard. This feature can aid mechanics in the faster and more accurate diagnosis and repair of engine problems.