18-058-26

Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one of the following Diagnostic Trouble Codes (DTCs):
• P1CEA - Boost Side Evap Purge System Performance.
• P0300-00 - Random/Multiple Cylinder Misfire Detected
• P0301-00 - Cylinder 1 Misfire
• P0302-00 - Cylinder 2 Misfire
• P0303-00 - Cylinder 3 Misfire
• P0304-00 - Cylinder 4 Misfire Customers may also experience one or more of the following:
• Engine RPM fluctuations at low vehicle speeds after extended idling.
• An ignition-off draw or battery drain condition.
• Sluggish engine performance and misfires.
• Engine knocking when the accelerator is pressed hard or quickly This bulletin involves inspecting and possibly reprogramming the PCM and Transmission Control Module (TCM) with the latest available software.