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.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.
U110E - Lost Ambient Temperature Message.
P049D - EGR Control Position Exceeding Learning Limit.Improvements To Prevent Or Reduce Malfunction Indicator Lamp (MIL) Illumination When No Defect Is Present For:
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:
Urea system calibration changes.
Fuel Filter Minder Calibration Changes.
Cruise control system improvements.
Improvements in exhaust brake switch operation.
Charging system improvements for dual alternator applications.
Various wiTECH data and system test additions and improvements.
OBD Template changes for P2453.
Dual Fuel Tank component update.
Inducement Timer Reset (Feature enable in wiTech).
PTO Denied Status Message Update.
PTO Horn Request sent to Body Control Unit (BCU.)
