Circuit Description
WARNING: This page is about a different variant/trim than selected.
The DTC P0340 Camshaft Position (CMP) Sensor Circuit diagnostic monitors the signal from the CMP sensor. The CMP sensor is a magnetic generator type sensor that produces an AC signal. The CMP sensor signal increases in frequency as the engine RPM increases. The camshaft position signal is used by the powertrain control module (PCM) to determine the optimum ignition timing and the optimum fuel delivery. The CMP sensor is also used to monitor engine misfire and monitor the operation of the CMP actuator system.