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 engine speed is greater than 300 RPM.
The engine is running for greater than 1 s.
The ignition voltage is 8 V or greater.
The DTCs runs continuously when the conditions above are met for greater than 1 s.