Conditions for Running the DTC (w/LLT)

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

The engine is operating.
The ignition voltage is between 10-18 volts.
The engine speed is less than 6,000 RPM.
The DTCs run continuously once per crankshaft revolution after the above conditions are met for 20 crankshaft revolutions.