Flash: Hybrid Control Processor (HCP) and Auxiliary Hybrid Control Processor (AHCP) Updates
This bulletin involves reprogramming the HCP and AHCP or also known as Power Inverter Module (PIM) with the latest available software.
Technicians and/or customers may report the vehicle will not pass a state smog check due to permanent fault codes which will not clear. As a result, the vehicles are not eligible to be registered in certain states. Customers may also experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, the technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: P1AF8-00 - MCPA Control Module Shutdown Performance. P1AFE-00 - MCPB Improper Shut Down.P1AF8-00&P1AFE-00 will now be set as a 1 trip failure instead of a 2 trip failure. P07B5-00 - Park Pawl Position Sensor 1 Circuit Performance. P177C-00 - Park Lock-Pawl Actuator Motor Current Sensor Performance. P0A46-00 - Drive Motor B Position Sensor 1 Circuit Range-Performance. P0A40-00 - Drive Motor A Position Sensor 1 Circuit Range-Performance. P2797-00 - Auxiliary Transmission Fluid Pump Performance. P0CF3-00 - Control Pilot Circuit Open. P0A44 - Drive Motor A Position Sensor 1 Circuit Overspeed. U0111-00 - Lost Communication With Battery Energy Control Module (BPCM). P1625-00 - Park Pawl System Failure. U0412-00 - Invalid Data Received From Battery Energy Control Module-A. P215B-00 - Vehicle Speed Output Shaft Speed Correlation. P079A-00 - Transmission Friction Element 1 Slip Detected. P079B-00 - Transmission Friction Element 2 Slip Detected. Customers may also comment:Vehicle will not start when temperature is -30° C (-22° F) and below. Heard and/or felt bump when the gas engine turns on while driving. Vehicle will not charge beyond 98%. "Service Charging System" and "Traction Battery Cutoff" warning messages appear during a key cycle event at -7° C (+20°F). Vehicle will force to Park when keyed off in Neutral if the door is open
