Circuit Description
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
This diagnostic monitors the signal from the camshaft position (CMP) sensor. The CMP sensor is a magnetic generator type sensor, producing an alternating current signal. The CMP sensor sends this signal to the powertrain control module (PCM) to indicate the camshaft position. The CMP signal is used by the PCM to modify fuel injection pulse, ignition timing and misfire detection.