Cummins X12 CM2350 X119B (2018 & Newer) Fault Code: 1685 PID: SPN: 3364 FMI: 4 Aftertreatment Diesel Exhaust Fluid Quality Sensor Circuit- Voltage Below Normal or Shorted to Low Source
Circuit DescriptionThe aftertreatment diesel exhaust fluid quality sensor is a smart device that communicates to the ECM via the J1939...