Coolant Temperature Above Normal - Sudden Overheat

WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.

Symptom	Possible Cause	Action	Reference
Coolant Temperature Above Normal - Sudden Overheat	Active DTCs or high counts of inactive DTCs	Check for active and inactive DTCs.	Work Flow
	Coolant level is below specification	Check the coolant level. Check for external leak. Sample the oil and check for coolant in the oil (internal leak).	System Inspection Inspection Coolant Loss - Internal
	Drive belt is broken or loose	Check the drive belt. Replace the belt, if necessary.	Inspection
	Charge-air cooler fins, radiator fins, or air conditioner condenser fins are damaged or obstructed with debris	Inspect the charge-air cooler, air conditioner condenser, and radiator fins. Clean, if necessary.	Inspection
	Thermostat is not correct or is malfunctioning	Check the thermostat for the correct part number and for correct operation.	Standard and Limit
	Coolant temperature gauge or sensor is malfunctioning	Test the gauge or the sensor. Repair or replace, if necessary.	Work Flow
	Cooling system hose is collapsed, restricted, or leaking	Check cooling system hoses.	System Inspection
	Water pump is malfunctioning	Check the water pump for correct operation. Replace the water pump, if necessary.	Exploded View
	Radiator cap is not correct, is malfunctioning, or has low pressure rating	Check the radiator pressure cap.	Standard and Limit
	Fan drive or fan controls are malfunctioning	Check the fan drive and controls.	Exploded View
	Cooling system component is malfunctioning	Perform Cooling System Diagnostics Test.	Symptom Table
	Vehicle speed is too low for adequate cooling with high engine load	Reduce the engine load. Increase the engine (fan) RPM by downshifting.	-