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: If cylinder 3 misfires is that a bad thing?

Hi there. A misfiring cylinder can be expensive if allowed to continue. The catalytic converter can be damaged. If the cylinder is misfiring, the coil, wire, and/or spark plug could be the cause. First swap the spark plug between cylinder...

Q: Q: Low coolant light came on.

Hi there. Check the coolant level sensor on the radiator and make sure that it's plugged in. If the radiator was replaced, there is a good possibility that the coolant level sensor could have been slightly plugged in and then...

Q: Two new xenon light bulbs burn out instantly as soon as they are turned out.

If the old bulb wasn't burnt out by the ballast, the new ones shouldn't either. The most likely cause of your woes are the cheap bulbs. I would strongly suggest only purchasing name brand bulbs. They may be much more...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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.