Conditions for Running the DTC

WARNING: This page is about a different car, the 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

The engine speed is greater than 80 RPM.
The ignition voltage is between 10-18 volts.
The ECM has commanded the CMP actuator solenoid ON and OFF at least once during the ignition cycle.
DTCs P0010, P0013, P2088, P2089, P2090, and P2091 run continuously once the above conditions are met.