Cummins ISC CM2150 (2007-09) Fault Code: 196 (2 wire sensor) PID: 111 SPN: 111 FMI: 4 Coolant Level Sensor 1 Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the engine coolant level 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, recalibrate the ECM.
Possible causes:
1)Signal circuit shorted to ground or return in the harness, sensor, or connectors.
Possible repairs:
1)Replace the engine coolant level sensor.
2)Repair or replace the OEM harness.
3)Replace the ECM.
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