18-030-14 REV. B

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 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 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 Malfunction Indicator Lamp (MIL) Illumination When No Defect Is Present For: U3017- Control Module Timer/Clock Performance 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 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 1 P0562 - Battery Voltage Low P0604 - Internal Control Module RAM Error P1451 - Diesel Particulate Filter