Cummins X15 CM2450 X124B (2018 & Newer) Fault Code: 1977 PID: SID 382 SPN: 3556 FMI: 5 Aftertreatment Doser Circuit- Current Below Normal or Open Circuit
Circuit DescriptionThe aftertreatment fuel injector is electronically controlled by the engine electronic control module (ECM) through a pulse width modulated...