Symptoms of a Bad or Failing Coolant Level Sensor

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The coolant level sensor is the electronic sensor that is responsible for measuring the coolant level of your engine. It is usually installed in the coolant reservoir or radiator, and measures the amount of coolant in the system to make sure that it is always at the proper level. When the level drops below a safe level the low coolant light will come on to alert the driver that coolant must be added. Low coolant is dangerous to the engine as the coolant is what keeps the engine from overheating during normal operation, so it is imperative to replace the coolant level sensor if it is failing.

1. Coolant Light stays on

One of the most common symptoms of a faulty coolant level sensor is a Coolant Level Light that stays on. If the sensor shorts, it can cause the Coolant Level Light to stay on. This is a problem because a permanently illuminated coolant light will not be able to properly alert the driver if the coolant level does drop low.

2. Low coolant

Another symptom of a problem with the coolant level sensor is low coolant. If the coolant level drops low and the light does not come on then that means the sensor or wiring are having a problem. The sensor is designed specifically to detect low coolant, so if the level in the reservoir drops low, and the light does not come on, that may be an indication of a problem with the sensor or perhaps the wiring.

2. Engine overheating

The engine overheating is another indicator of a problem with the sensor. Engine overheating can be caused by a variety of issues, usually not related to any sensors. However, if the overheating is related to coolant level, this may be an indicator of a problem with the sensor. If the coolant level drops low enough to cause overheating, and the low coolant light is not illuminated beforehand, then that may be an indicator of a problem with the sensor.

While the coolant level sensor doesn’t play a big role in engine performance or drivability, it does serve a very specific purpose in protecting the engine from dropping low in coolant and potentially overheating. For this reason, if you suspect that your coolant level sensor may be having an issue, have the vehicle diagnosed by a professional technician, such as one from YourMechanic. They will be able to inspect your vehicle and determine if your car will need a replacement coolant level sensor.


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Rigoberto

9 years of experience
706 reviews
Rigoberto
9 years of experience
Chevrolet Equinox - Brake Pads Replacement (Rear) - Niles, Illinois
Rigo was great! He got there early, finished the job early, left everything clean. He changed my rear pads and rotors. The original quoted time was 90 minutes, he was done in about 60. He knows what he is doing and I am recommending him to all my friends and coworkers.
Mercedes-Benz C250 - Brake Pads Replacement (Front, Rear) - Chicago, Illinois
Rigo is a maverick hands down. Don’t take your car for work elsewhere. Especially great at Mercedes—this guy knows his profession! I will be using him for everything related to my car going forward.

Arturo

25 years of experience
35 reviews
Arturo
25 years of experience
Kia Forte - Brake Pads Replacement (Front) - San Diego, California
ARTURO is great! very professional , fast, replaced my front brake pads and oil an filter change. everything now works and works well. Brakes have much improved stopping power and engine is smooth and quiet.Arturo is also kind and thoughtful. "Your mechanic" is very fortunate to have Arturo Lopez represent your company. I enthusiastically recommend him and "Your mechanic> as a fine operation Best regards to the Team Peter Marto
Nissan Maxima - Brake Pads Replacement (Front, Rear) - San Diego, California
Arturo was prompt and completed my brake repair, including new rotors in a very efficient manner. I am very pleased with the quality of the work and the parts and will definitely look to have him service our other car in the near future.

Scott

32 years of experience
345 reviews
Scott
32 years of experience
Lexus IS250 - Brake Pads Replacement (Rear) - Denver, Colorado
Always on time, speedy, professional, and pleasant to interact with. The work is always consistent and we'll done. I can't reccomend Scott highly enough!

Michael

10 years of experience
15 reviews
Michael
10 years of experience
Nissan Sentra - Brake Pads Replacement (Front) - Conyers, Georgia
He was promptly on time and got the job done efficiently in a timely manner. I really appreciate the rapid respone on getting the job done! I would most definitely use this service again.

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