Conditions for Running the DTC

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The engine is operating.
The ignition voltage is between 9-18 volts.
The engine speed is less than 5,000 RPM.
The DTCs run continuously once per crankshaft revolution after the above conditions are met for 20 crankshaft revolutions.