Flash: 6.7L Diagnostic And System Improvements
This bulletin involves reprogramming the Engine Control Module/Powertrain Control
Module (ECM/PCM) with the latest available software.
A small number of customers may experience a Malfunction Indicator Lamp (MIL)
Illumination. Upon further investigation, a technician may find one or more of the following
Diagnostic Trouble Codes (DTCs) set in the PCM memory.
? P2281 - Air Leak Between MAF And Throttle Body.
? P1477 - Intake Air Diverter Valve Position Sensor Circuit Shorted To Ground.
? U3017 - Control Module Timer/Clock Performance.
? U110E - Lost Ambient Temperature Message.
? P0087 - Fuel Rail Pressure Too Low.
? P2281 - Air Leak Between MAF And Throttle Body.
? P0544 - Exhaust Gas Temperature Sensor Circuit - Sensor 1/1.
? P0128 - Thermostat Rationality. In cold ambient temperatures.
? P214D - SCR NOx Catalyst Outlet Temperature Too High During Particulate Filter
Regeneration.
? P24A5 - EGR Cooler Bypass Bank 1 Control Stuck.
? P040B - Exhaust Gas Recirculation Temperature Sensor ?A? Circuit Performance.
? U1421 - Implausible Ignition Key Off Time Received.
? P0420 - Catalyst Efficiency Below Threshold.
? P026B - Injection Timing Performance.
? P04DB - Crankcase Ventilation System Disconnected.
? P1C55 - NOx Sensor Intermittent - Bank 1 Sensor 1.
? 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.
? P1451 - Diesel Particulate Filter System Performance.
In addition to the above symptoms, the following software improvements are also included
in this update.
The Following DTCs 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.
? P226C - Turbocharger Boost Control
