18-030-14 REV. A

Flash: 6.7L Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo Diesel. Prevent Or Reduce Unnecessary Malfunction Indicator Lamp (MIL) Illumination For The Following Diagnostic Trouble Codes (DTCs). These Faults Are Currently Tripped As A One Trip Fault And Should Have Been A Two Trip Fault: * P0201 - P0206 - Fuel Injector X Circuit/Open. * P049D - EGR Control Position Exceeding Learning Limit. * P0711 - Transmission Temperature Sensor Performance. * P0712 - Transmission Temperature Sensor Low. * P0713 - Transmission Temperature Sensor High. * P0714 - Transmission Temperature Sensor Intermittent. * P0740 - TCC Out Of Range. * P0869 - Line Pressure High. * P0933 - Hydraulic Pressure Sensor Range/Performance. * P0934 - Line Pressure Sensor Circuit Low. * P0935 - Line Pressure Sensor Circuit High. * P1775 - Solenoid Switch Valve Latched In TCC Position. * P1776 - Solenoid Switch Valve Latched In LR Position. * U0100 - Lost Communication With ECM/PCM. * U0002 - CAN C Bus Off performance - Bus Off. * U110E - Lost Ambient Temperature Message. The Following DTC Has Been Changed From A Two Trip Fault To One Trip Fault: * U1A24 - Lost Communication With Ammonia Sensor. Improvements To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp (MIL) Illumination For: * P026B - Injection Timing Performance. * P0128 - Thermostat Rationality. In cold ambient temperatures. * P0087 - Fuel Rail Pressure Too Low. * P2281 - Air Leak Between MAF and Throttle Body. * U3017 - Control Module Timer/Clock Performance. * U1421 - Implausible Ignition Key Off Time Received. * P026A - Charge Air Cooler Efficiency Below Threshold. * P04DB - Crankcase Ventilation System Disconnected. * P0544 - Exhaust Gas Temperature Sensor Circuit - Bank 1 Sensor