Cummins ISX CM870 (2003-06) Fault Code: 196 (3 wire) PID: P111 SPN: 111 FMI: 4/4 Coolant Level Sensor 1 Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the engine coolant level circuit.
Possible causes:
1)Open signal circuit in the engine harness, connectors, or sensor
2)Signal circuit shorted to ground in the engine harness, connector, or sensor
3)Damaged sensor.
Possible repairs:
1)Replace the engine coolant level sensor.
2)Repair or replace the OEM harness.
3)Replace the ECM.
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