OBDII Automotive Articles - Camshaft Position Sensor

Camshaft Position Sensor

The camshaft position sensor consists of a magnet, an iron core, and a pick-up coil. This sensor monitors a timing rotor located on the camshaft and is used by the Engine Control Module (ECM) to detect the camshaft angle. The camshaft rotation synchronizes with the crankshaft rotation, and this sensor communicates the rotation of the camshaft timing rotor as a pulse signal to the ECM. Based on the signal, the ECM controls fuel injection time and ignition timing.

If there is no signal from the camshaft position sensor even though the engine is turning or the rotation of the camshaft and the crankshaft is not synchronized, the ECM interprets this as a malfunction in the sensor and sets the camshaft position sensor code.

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