Conditions for Setting the DTC
WARNING: This page is about a different car, the 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
The hybrid powertrain control module detects the hybrid low, 1-2 clutch slip speed is less than 80 RPM for 5 seconds, when hybrid low, 1-2 clutch is expected to be OFF.