Q: Low coolant level warning

asked by on

The dashboard in my car shows the "low coolant level" warning. It occurs only on the startup. However, I keep the coolant at the optimum level at all times. Why is this warning coming up?

Hello. If the coolant level shows low when the coolant is cold, and then reads fine once it warms up, then most of the time this is due to a bad coolant level sensor. This is assuming that the coolant is indeed at the correct level.

If it is, then I usually start by testing the sensor itself to see if it is reading correctly. Most of the time this is the problem. In some cases it can be a wiring issue, but that is not as common. If you are going to have this repaired, consider YourMechanic, as a certified mechanic can come to you home or office to diagnose your coolant warning light and repair this.

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 level warning

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: Q: Sunroof won't close

I would recommend having your sunroof inspected by a certified mechanic. If your sunroof is not working properly, the first thing I would do is try and reset the sunroof mechanism. This can be done by either unplugging the motor,...

Q: P0505 code Idle Air Control for bmw 540i

The TPS can have between 5 and 10 different codes and all will be caused by different failures of the TPS, Throttle body, wiring or computer issues and you will need to supply the code you get to help you...

Q: Coolant depletes quickly

The temperature gauge issues may be the result of a faulty coolant temperature sensor or a low coolant level. If there is no coolant in the system, the sensor cannot read temperature accurately. It would be best to consult the...

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.