18-042-15

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