Flash: Doser Control Unit (DCU), Heater Thaw Time Improvements And MIL Illumination
This bulletin involves selectively erasing and reprogramming the Doser Control Unit (DCU) with new software.
Software improvements are available for the Diesel Exhaust Fluid (DEF) DCU on vehicles equipped with a Cummins 6.7L turbo Diesel. The software contains improvements for the following:
Increase in DEF thaw time when ambient and DEF tank temperatures are below -14°C. (7°F.).
P208D - (DIESEL EXHAUST FLUID) REDUCTANT PUMP CONTROL CIRCUIT HIGH
P202E - (DIESEL EXHAUST FLUID) REDUCTANT INJECTOR PERFORMANCE
