Conditions for Running the DTC

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

The ignition is in the Run or Crank position.
The ignition voltage is between 11-32 V.
The ECM has commanded the MIL ON and OFF at least once during the ignition cycle.
The DTC runs continuously when the above conditions are met.