Verify the 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 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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