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.
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:
· **P218F - Reductant No Flow Detected.
· P242F - Diesel Particulate Filter Restriction - Ash Accumulation.
· P2281 - Air Leak Between MAF And Throttle Body.**
· P205E - (Diesel Exhaust Fluid) Reductant Tank Temperature Sensor Circuit
Intermittent (setting when the block heater is plugged in).
· U110E - Lost Ambient Temperature Message.
· P20E8 - (Diesel Exhaust Fluid) Reductant Pressure Too Low.
· P1477 - Intake Air Diverter Valve Position Sensor Circuit Shorted To Ground.
· U3017 - Control Module Timer/Clock Performance.
· P0087 - Fuel Rail Pressure Too Low.
· 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 - Exhaust Gas Recirculation (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.
