Flash: 6.4L Diagnostic And System Improvements
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software.
Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: ? P0300 - Multiple Cylinder Misfire, cold Idle misfire (DJ,D2 or DD vehicles only). ? P030X - Cylinder Misfire (any cylinder) (Additional improvements over the last software update).
? P04D1 - Cooled EGR Temperature Sensor Circuit High.
? P04D0 - Cooled EGR Temperature Sensor Circuit Low.
? P2504 - Charging System Output High.
? P0441 - Evap Purge System Performance.
? P2066 - Fuel Level Sensor 2 Performance.
? P0401 - EGR System Performance (DJ/D2 vehicles only).
? P2096 - Downstream Fuel Trim System 1 Lean (DD/DP vehicles only).
? P2098 - Downstream Fuel Trim System 2 Lean (DD/DP vehicles only).
? P0740 - TCC Out of Range (DD vehicles equipped with a DFP automatic transmission).
Customers may also experience any of the following conditions:
? Slightly elevated idle speed noticed during engine warm-up when in Reverse or Drive and when operating in cold ambient temperatures.
? PTO mobile mode cancels or deactivates when vehicle comes to a stop (DD/DP vehicles only). ? Engine cycles in and out of MDS mode too often when operating in PTO stationary mode (DD/DP vehicles only). ? PTO stationary mode cancels or deactivates when PTO up-fit equipment loads fluctuate (DD/DP vehicles only)
The following powertrain system improvements/enhancements are also included in this software release:
? Improve Idle at high altitudes (DJ,D2 or DD vehicles only).
? Spark knock on vehicle with low octane fuel (DJ,D2 or DD vehicles only).
? Operator idle speed control enhancements.
? Raise 4x4 low range minimum engine speed from 725 to 800 RPM.
? Raise minimum engine speed to allow MDS activa
