Q: Low Coolant light flashing.

asked by on

The Low Coolant light is flashing for about 30 seconds after the initial startup for the day. I'm not sure whether to clean out the overflow tank, or whether the vehicle needs a new ECTS, thermostat, or new coolant.

When you see a flashing Low Coolant light on your Saturn’s dashboard, the coolant level sensor is reading that there is no coolant in your expansion tank. This is very easy to verify, just be sure your car is cold, such as first thing in the morning. First you will want to check under the hood for your expansion tank. This tank is located on the passenger side of the engine bay, along the side of the fender. Open the expansion tank cap and look inside to see if you are low on coolant. If you are, it is likely you have a leak. If you are not, it is likely the coolant level sensor in the bottom of the expansion tank is either stuck or has failed. In my experience I have seen some cases of removing the expansion tank and cleaning it can unstick the coolant level sensor. Other times it will need to be replaced. Whether you have a leak or you need your sensor cleaned or replaced, it’s best to enlist the help of a certified mechanic so they can visually inspect why your low coolant light is on in your car.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Low Coolant light flashing.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Hi I have a 2011 Infiniti ex35 has no leak but I just realize that the radiator bottle is empty and the coolant is low? What shoul

If your overflow coolant reservoir is getting empty you should keep the coolant full to prevent overheating the engine. The coolant may be low for a couple reasons. The first is you have a leak in the cooling system externally...

Q: My car won't shift into third gear.

This may be related to a faulty transmission control module. This may or may not be related to your mudding experience, as sometimes the symptoms of this can be random or intermittent. A faulty transmission control module may cause a...

Q: How can someone tell if it's timing chain or something else that would cause the motor to freeze up? Thanks.

Remove the timing chain cover and see if the chain is intact. If the chain is broken, then either the chain can bind up on the crankshaft sprocket or the pistons can come in contact with the valves when they...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.