Actions Taken When the DTC Sets

WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

DTCs P0658, and P0659 are Type A DTCs.

P0658

The Hybrid/EV powertrain control module commands maximum line pressure.
The Hybrid/EV powertrain control module inhibits clutch 1, also call the variable low clutch.