There is a coolant leak.
Depending on where you see coolant, the leak can be something as simple as a hose, to a more complex thing like a heater core. There is coolant in the engine, radiator, hoses, and inside the vehicle via the heater core. If a visual inspection cannot pinpoint the leak, a mechanic typically performs a pressure test of the cooling system to help locate the leak. From here, they will be able to take appropriate actions to repair the coolant leak.
Have a car question? Get free advice from our top-rated mechanics.
Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%