* Low Coolant Level: While a blinking light isn't the *usual* indicator for this, a severely low coolant level can cause overheating, triggering the blinking light. Check your coolant reservoir immediately. If it's low, do not just add coolant. Find out *why* it's low first (leak, etc.).
* Overheating: This is the most probable cause of a blinking low coolant light. The engine is getting too hot, and the system is trying to warn you to prevent serious damage. This could be due to:
* Faulty Thermostat: A stuck closed thermostat prevents coolant from circulating, leading to overheating.
* Water Pump Failure: A malfunctioning water pump can't circulate coolant effectively.
* Radiator Problems: A clogged radiator, leaking radiator, or damaged radiator fan will impair cooling.
* Head Gasket Failure: A blown head gasket is a severe issue that allows coolant to leak into the engine cylinders or vice-versa, leading to overheating and potentially significant engine damage. This often presents with other symptoms like white smoke from the exhaust, milky oil, or loss of compression.
* Coolant Leaks: Leaks in hoses, the radiator, or the water pump will cause low coolant levels and ultimately overheating.
* Faulty Coolant Temperature Sensor: While less likely to cause a *blinking* light, a faulty sensor could provide inaccurate readings leading to the light flashing erratically.
What to do IMMEDIATELY:
1. Pull over safely: Do not continue driving with a blinking low coolant light. Further driving can cause catastrophic engine damage.
2. Turn off the engine: Let the engine cool down completely before attempting any inspection.
3. Check the coolant level: Carefully (it will be hot!) check the coolant reservoir. If it's low, look for visible leaks around the engine and radiator.
4. Do NOT open the radiator cap while the engine is hot: You risk serious burns from escaping hot coolant and steam.
After the engine has cooled: You should have the vehicle inspected by a qualified mechanic. They can diagnose the exact cause of the blinking light and perform the necessary repairs. Ignoring this issue could lead to very costly engine repairs or even a complete engine failure.
