Flash: Powertrain System Improvements/Enhancements

Bulletin number

18-023-14

Component

Engine

Summary

Flash: Powertrain System Improvements/Enhancements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. The following powertrain system improvements/enhancements are included in this software release: ? Enhanced Automatic Oil Change Indicator(EAOCI) system enhancements that force the use of the severe duty cycle algorithm anytime the PCM is replaced. The vehicle duty cycle information used in the EAOCI calculation is stored in the PCM and cannot be recovered/transferred when the controller is replaced. As a result, the severe duty cycle is used in these scenarios to ensure the customer receives a timely oil change required message. ? Corrected a generic scan tool display issue regarding Mode 6 data accuracy. ? Improved Electronic Voltage Regulator control to more precisely maintain system voltage.

Owners of these vehicles have filed 103 complaints in the engine category.