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.
The following Diagnostic Trouble Codes (DTCs) have been changed from a one trip fault to a two trip fault:P2280 - Air Flow Restriction / Leak Between Air Cleaner and MAF.
P203C - (Diesel Exhaust Fluid) Reductant Level Sensor Circuit Low.
P208D - (Diesel Exhaust Fluid) Reductant Pump Control Circuit High.
Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation a technician may find the following DTCs set in the PCM memory:P218F - Reductant No Flow Detected(automatic transmission only).
P202E - (Diesel Exhaust Fluid) Reductant Injector Performance(automatic transmission only).
U0001-00 - CAN C BUS(automatic transmission only).
P1C55 - NOx Sensor Intermittent - Bank 1 Sensor 1(automatic transmission only).
P24A5 - EGR Cooler Bypass Bank 1 Control Stuck(automatic transmission only).
P207F - Reductant Quality Performance.
P218F - Reductant No Flow Detected.
U110E - Lost Ambient Temperature Message.
The following improvements/enhancements are also included in this software release:Fuel pressure override test improvement for wiTECH(automatic transmission only).
AC pressure sensor error threshold change(automatic transmission only).
No crank, No start fix(automatic transmission only).
Ambient Air Temperature Improvements.
Stationary de-soot with WiTECH fix.
