CMP Actuator System Performance Diagnostics
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
The control module monitors the performance of the camshaft position (CMP) actuator system by monitoring the actual and desired position of the CMP Sensor. If the difference between the actual and desired position is more than a calibrated angle for more than a calibrated amount of time, a DTC will set.