Coolant Loss - External

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 Loss - External	Coolant level is above specification	Check the coolant level.	System Inspection
	External coolant leak	Inspect the engine for coolant leaking from hoses, drain cocks, jumper tubes, fittings, exhaust gas recirculation (EGR) cooler coolant supply and return tubes, EGR cooler vent lines, EGR cooler, radiator core, oil cooler, head gaskets, and water pump seal. If necessary pressure test the cooling system.	System Inspection
	Radiator cap or reservoir tank cap is not correct, is malfunctioning, or has low-pressure rating	Check the radiator cap and/or the reservoir tank cap.	System Inspection
	Cooling system hose is collapsed, restricted, or leaking	Inspect the hoses.	System Inspection
	Incorrect plumbing routing, resulting in loss of coolant through the coolant overflow	Review the plumbing to be positive that no high pressure coolant can cause backflow in the fill line.	System Inspection
	Engine is overheating	Refer to the Coolant Temperature Above Normal - Gradual Overheat symptom diagnosis.	Coolant Temperature Above Normal - Gradual Overheat
	Air or combustion gases are entering the cooling system	Check for air or combustion gasses in the cooling system.	-