Camshaft Position 11 (CMP11) Sensor
The CMP11 sensor is a Hall effect sensor that detects the position of the camshaft. The CMP11 sensor identifies when piston number 1 is on its compression stroke. A signal is then sent to the PCM and used for synchronizing the sequential firing of the fuel injectors. The PCM also uses the CMP11 signal to select the correct ignition coil to fire.