The CMP (Camshaft Position) sensor and the CKP (Crankshaft Position) sensor work together with the objective of controlling both time and delivery to be compatible. These sensors have a reluctor ring that passes over a magnetic sensor, which in turn generates a voltage that indicates the position of the camshaft and the crankshaft.
The CKP (Crankshaft Position) sensor is part of the primary ignition system and acts as a trigger. This detects the position of the crankshaft relays, which pass the information to the PCM (Powertrain Control Module) to control the time of the ignition spark.
For its part, the CMP (Camshaft Position) sensor detects the position of the camshaft and sends this information to the PCM (Power Train Control Module) who uses this information to identify the beginning of the sequence of the camshaft injector.
These two sensors are joined by the timing belt. Both the cam and the crank must be synchronized accurately. If the PCM detects that the CMP and CKP sensor signals are out of time, in a specific number of degrees, the DTC code P0016 OBD2 is set.