Circuit Description

WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.

The DTC P0011 Intake Camshaft Position (CMP) System Performance-Retarded monitors the operation of the camshaft position (CMP) actuator system. The CMP actuator system enables the powertrain control module (PCM) to change the intake camshaft timing while the engine is running. The CMP actuator solenoid controls the advance or retard of the camshaft. The CMP actuator solenoid is controlled by a pulse width modulated (PWM) signal from the PCM. The CMP sensor monitors the camshaft position or the camshaft angle, and compares that position or phase to the crankshaft position (CKP) sensor signal. The PCM determines whether the camshaft angle is correct by comparing the actual camshaft position to the target camshaft position. By continuously analyzing the input of the CMP sensor and the CKP sensor the PCM can detect a failure in the CMP actuator system. For additional information on the operation of the CMP actuator system refer to Camshaft Actuator System Description .