18-088-20

Flash: Dosing Control Unit (DCU) Updates This bulletin involves reprogramming the DCU with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following DTCs have been set:U05A3-00 - Invalid Data Received From Reductant Quality Module. P20F4-00 - Reductant Consumption Too Low. P20F5-00 - Reductant Consumption Too High. P208E-00 - Reductant Injector Stuck Closed - Bank 1 Unit 1.