08-021-25 REV. D

Flash: Motor Control Processor B (MCP B) Updates 11B3 Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may exhibit/set the following Diagnostic Trouble Code (DTC):
• **P1E18-00 - Internal Control Module Electronic Park Performance.
• P1625-00 - Park Pawl System Failure.
• P0A78-00 - Drive Motor A Inverter Performance.
• P0A79-00 - Drive Motor B Inverter Performance.**
• P1626-00 - Park Pawl Motor Stuck. Customers may also comment on one or more of the following:
• **Will not be able to start the vehicle.
• Vehicle not shutting off and a draining 12V battery.**
• Wrench lamp on in the Instrument Panel Cluster (IPC).
• Not able to move the shifter out of Park.
• Vehicle has reduced power. This bulletin also includes the following software enhancement:
• Software enhancement to prevent erroneous fault identification resulting in inverter shutdown This bulletin involves reprogramming the IDCM, BPCM, MCP A, MCP B and the EVCU with the latest available software and then, if needed, performing a Wheel End Disconnect Position Learn routine