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 engine speed is greater than 500 RPM.
Ignition voltage is between 8.6-19.0 volts.
The engine run/crank voltage signal from the ECM is valid.
Serial data communications is enabled.