18-026-25 REV. A

Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle mustexhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):
• **P04B5 - Fuel Fill Door Stuck Open.
• P1D83 - Implausible Engine Oil Temperature Signal Received.**
• P2450 - Fuel Tank Isolation Valve Stuck Open.
• P0032 - O2 Sensor 1/1 Heater Circuit High.
• P2097 - Downstream Fuel Trim System 1 Rich.
• P0171 - Fuel System 1/1 Lean.
• P0300 - Multiple Cylinder Misfire.
• P06E4 - Control Module Wake-Up Circuit Performance.
• B12B4 - Charge Status Indicator Module Internal.
• P061B - Internal Control Module Torque Calculation Performance.
• P0810 - Clutch Position Control Error.
• P2885 - Engine Disconnect Clutch Engagement Fault. Customers may also experience one or more of the following:
• **Decreased Fuel Efficiency.
• Reduced engine performance or rough idling.**
• "Service Hybrid System" message displays on the Instrument Panel Cluster (IPC).
• Wrench icon displays on the IPC.
• Vehicle misfires.
• Low speed engine stall at idle.
• Difficulty shifting out of 4LO.
• Idle creep while in 4LO with transmission in neutral. This bulletin involves reprogramming the Powertrain Control (PCM) and the Auxiliary Hybrid Control Processor (AHCP) also known as Power Inverter Module (PIM) and possibly the Transmission Control Module (TCM) with the latest available software.