Flash: 6.7L Diagnostic And System Improvements
This bulletin involves selectively erasing and reprogramming the Engine Control Module
(ECM/PCM) with new software.
Several software improvements are available for vehicles equipped with a Cummins 6.7L
turbo Diesel.
WARNING:There will be a choice between 2 calibrations. One for vehicles that
utilize an ammonia sensor and one for vehicles that have had the
ammonia sensor removed. Be sure to select the correct software based
on vehicle configuration.
Prevent Or Reduce Malfunction Indicator Lamp (MIL) Illumination When No Defect is
Present For The Following Diagnostic Trouble Codes (DTCs). These Faults Have
Been Changed From A One Trip Fault To A Two Trip Fault:
P0201 - P0206 - Fuel Injector X Circuit/Open Fault Codes.
P049D - EGR Control Position Exceeding Learning Limit.
Improvements To Prevent Or Reduce Malfunction Indicator Lamp (MIL) Illumination
When No Defect Is Present For:
? P205E - (Diesel Exhaust Fluid) Reductant Tank Temperature Sensor Circuit
Intermittent (setting when the block heater is plugged in).
? P20E8 - (Diesel Exhaust Fluid) Reductant Pressure Too Low.
? U110E - Lost Ambient Temperature Message.
? U3017 - Control Module Timer/Clock Performance.
? P0087 - Fuel Rail Pressure Too Low.
? P0544 - Exhaust Gas Temperature Sensor Circuit - Sensor 1/1.
? P2281 - Air Leak Between MAF And Throttle Body.
? P0128 - Thermostat Rationality. In low ambient temperatures.
? U1421 - Implausible Ignition Key Off Time Received.
? P202E - Diesel Exhaust Fluid (DEF) Reductant Injector Performance.
? P20EE - SCR NOX Catalyst Efficiency Below Threshold - Bank 1.
? P2002 - Diesel Particulate Filter Efficiency Below Threshold.
? P0604 - Internal control Module RAM Error. This DTC may be caused by enabling
the remote throttle feature via the EVIC, and it will be accompanied by a ?service
electronic throttle control? message in the EVIC.
Other Updates:
? SCR Efficiency scan tool test improvement.
