Cummins ISB6.7 CM2150 (2007-09) Fault Code: 428 PID: 97 SPN: 97 FMI: 3 Water-in-Fuel Indicator Sensor Circuit – Voltage Above Normal or Shorted to High Source. High voltage detected at the water-in-fuel circuit.
Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe™ Online for applicable fixes to the calibration stored in the ECM. If necessary, calibrate the ECM.
Possible causes:
1)Open return or signal circuit in the harness, connectors, or sensor 2)Signal wire shorted to sensor supply or battery voltage.
Possible repairs:
1)Clean the connector and pins. 2)Replace the water-in-fuel sensor. 3)The removal and installation of the connector may correct the fault. 4)Repair or replace the engine harness. Replace the ECM.