2020 QX60 Coolant Low Warning - What should I check?

ClearTheCode admin answer:

A 'Coolant Low' warning on your 2020 Infiniti QX60 is definitely something to address promptly, even if the temperature gauge appears normal. A sweet smell often indicates a coolant leak, even if it's not pooling on the ground.

1. Check the Reservoir: Start by checking the coolant level in the overflow reservoir. It should be between the 'MIN' and 'MAX' lines when the engine is cold. If it's low, you can top it off with the correct type of coolant (Nissan Long Life Coolant or equivalent, typically a blue or green extended-life coolant).
2. Visual Inspection (Cold Engine):
   • Radiator: Look for any discoloration, crusty residue, or wet spots on the radiator fins.
   • Hoses: Inspect all radiator hoses (upper and lower) and heater hoses for cracks, bulges, or signs of leaks around the clamps.
   • Water Pump: Check the area around the water pump for leaks. This is often located on the front of the engine.
   • Thermostat Housing: Leaks can sometimes occur around the thermostat housing.
   • Radiator Cap: Ensure the radiator cap is securely tightened and that its rubber seal isn't cracked or damaged.
3. Common Leak Spots on QX60s: While not exclusive, common areas can include the radiator end tanks, water pump seal, heater core hoses, or even a small leak from the radiator itself that evaporates before hitting the ground.
4. When to See a Shop:
   • If you can't identify the source of the leak after a thorough visual inspection.
   • If the coolant level continues to drop after topping it off.
   • If you notice the engine temperature gauge rising above normal.
   • A professional can perform a cooling system pressure test, which is the most effective way to pinpoint small, hard-to-find leaks. They can also check for head gasket issues if coolant is disappearing without an external leak.