Conditions for Running the DTC

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

The ignition voltage is between 9 and 18 volts.
The engine speed is more than 800 RPM.
The ECM/PCM A/C compressor clutch relay control transitions between ON to OFF or from OFF to ON.