Circuit/System Description
WARNING: This page is about a different car, the 2013 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
This diagnostic applies to internal microprocessor integrity conditions within the engine control module (ECM). The hybrid powertrain control module (HPCM) sends an engine torque requested message to the ECM over GMLAN. The ECM monitors the data to verify that the indicated engine torque requested calculation is correct. The ECM processor monitors the data to verify that the engine torque command is correct.