Possible causes

– Dirty Oil
– Low engine oil level
– Faulty Intake Camshaft Position Actuator Solenoid
– Intake Camshaft Position Actuator Solenoid harness is open or shorted
– Intake Camshaft Position Actuator Solenoid circuit poor electrical connection
– Faulty Engine Control Module (ECM)

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P0011 BUICK Description

The Camshaft Position (CMP) actuator is attached to each camshaft and is hydraulically operated in order to change the angle of the camshaft relative to Crankshaft Position (CKP). The CMP actuator solenoid is controlled by the control module. The control module sends a pulse width modulated 12-volt signal to a CMP actuator solenoid. The solenoid controls the amount of engine oil flow to a CMP actuator. The CMP actuator can change the camshaft angle a maximum of 25 degrees. The control module increases the pulse width to accomplish the desired camshaft operation.

BUICK Technical Service Bulletins for P0011 code