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 the following conditions.
The Following DTC Has Been Changed From A Two Trip Fault To One Trip Fault:
? U1A24 - Lost Communication With Ammonia Sensor.
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:
? U110E - Lost Ambient Temperature Message.
? 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.
Improvements To Prevent Or Reduce Malfunction Indicator Lamp (MIL) Illumination
When No Defect Is Present For:
? P2281 Air Leak Between MAF And Throttle Body.
? U3017 - Control Module Timer/Clock Performance.
? P1477 - Dual Snorkle Calibration Change to Voltage Limit.
? P20EE - SCR NOX Catalyst Efficiency Below Threshold - Bank 1.
? P20E8 - (Diesel Exhaust Fluid) Reductant Pressure Too Low.
? U3017 - Control Module Timer/Clock Performance.
? P026B - Injection Timing Performance.
? P0128 - Thermostat Rationality. In cold ambient temperatures.
? P0087 - Fuel R
