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.
These 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.
A small number of customers may experience a Malfunction Indicator Lamp (MIL)
illumination. Upon further investigation a technician may find the following Diagnostic
Trouble Codes (DTCs) set in the PCM memory:
· P1C55 - NOx Sensor Intermittent - Bank 1 Sensor 1.
· P207F - Reductant Quality Performance.
· P218F - Reductant No Flow Detected.
· U110E - Lost Ambient Temperature Message.
In addition to addressing the above DTCs, the following powertrain system
improvements/enhancements are also included in this software release:
· Ambient Air Temperature Improvements.
· Stationary de-soot with WiTech fix.
