Flash: 3.0L Powertrain Diagnostic And System Enhancements
This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest
available software.
A small number of customers may experience a Malfunction Indicator Lamp (MIL)
illumination. Upon further investigation a technician may find one of more of the following
Diagnostic Trouble Codes (DTCs) set in the PCM memory.
? P20C2 - Reductant Heater 3 Control Circuit Performance.
? P204F - Reductant System Performance.
? P20E9 - Reductant Pressure Too High.
? P016A-00 - Excessive Time To Enter Closed Loop Air/Fuel Ratio Control.
In addition to addressing the above DTCs, the following powertrain system
improvements/enhancements are also included in this software release.
? Enhancements to improve A/C compressor relay duty cycle operation to prevent
ignition off battery draw.
? Powertrain system improvements to enable EGR cleaning routine.
