Cummins ISX CM870 (2003-06) Fault Code: 195 (2 wire) PID: P111 SPN: 111 FMI: 3/3 Coolant Level Sensor 1 Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at engine coolant level circuit.
Possible causes:
1)Open return circuit in the engine harness, connectors, or sensor.
2)Signal wire shorted to sensor supply or battery voltage.
Possible repair:
1)Repair or replace the OEM harness.
2)Replace the ECM.
3)Replace the engine coolant level sensor.
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