Symptoms of a Bad or Failing Coolant Level Sensor

Our certified mechanics come to you · Backed by our 12-month, 12,000-mile warranty · Get a fair and transparent estimate upfront

GET A QUOTE Backed by 12-month, 12,000-mile guarantee
Red-stars EXCELLENT RATING ON

Cost of Replacing a Bad or Failing Coolant Level Sensor

If the Coolant Light stays on permanently, there is low coolant, or the engine is overheating, you may have to replace the coolant level sensor. Our certified technicians can come to you and diagnose the problem. You will receive a $30 credit towards any follow-up repairs that result from the diagnostic. Following are example prices for Coolant Level Sensor Replacement. Click on the button below to get an upfront quote for your car.

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2009 Saab 9-5 $102 $32.36 $70.00 26% $139.86
2011 Hyundai Elantra $102 $32.36 $70.00 26% $139.86
2011 Ford Focus $236 $165.95 $70.00 13% $273.45
2009 Lincoln Navigator $143 $73.18 $70.00 20% $180.68
2014 BMW X6 $91 $21.47 $70.00 29% $128.97
2012 Audi S5 $116 $18.12 $98.00 31% $168.62
GET A QUOTE FOR YOUR CAR

How to Diagnose a Bad or Failing Coolant Level Sensor?

coolant level sensor

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.

3. 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.

Sensors
Coolant Service Light
Cooling System
fuel economy

Fast and easy Coolant Level Sensor Replacement service at your home or office.

GET A QUOTE FOR YOUR CAR
Backed by 12-month, 12,000-mile guarantee

Recent Coolant Level Sensor Replacement reviews

Excellent Rating


YourMechanic Coolant Level Sensor Replacement Service

Average Rating

4.1/5

Number of Reviews

9

Rating Summary
7
0
0
0
2
7
0
0
0
2

Peter

40 years of experience
972 reviews
Peter
40 years of experience
He was early and worked very quickly. Answered all my concerns. He was very friendly to my two boys who were very interested to see what he was doing under the hood.
2005 VOLVO XC90 - COOLANT LEVEL SENSOR - PHOENIX, ARIZONA

Chris

19 years of experience
1126 reviews
Chris
19 years of experience
He did the job as described with no issues. Even provided his number to provide further assistance and research when the job he completed did not resolve the actual car problem. Had him work on my car a couple times and he has been consistently good.
2006 SATURN VUE - COOLANT LEVEL SENSOR - ALISO VIEJO, CALIFORNIA

Rodrick

20 years of experience
4 reviews
Rodrick
20 years of experience
Did a good job. Very Knowledgeable.. Showed up early, and got right on the job.
2011 JAGUAR XF - COOLANT LEVEL SENSOR - ARLINGTON, TEXAS

Mack

19 years of experience
72 reviews
Mack
19 years of experience
Timely knows cars
2011 JAGUAR XF - COOLANT LEVEL SENSOR REPLACEMENT - GRAND PRAIRIE, TEXAS

More related articles

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...
Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...
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...

Related questions

Q: ABS ON after 18MPH

The light comes on after 18mph since this is the speed where the ABS will start to work on your car. The light is coming on due to one or more wheel speed sensors are not sending a signal to...

Q: Check engine light flashing, sucking fuel, procrastinating when accelerating...

This is a very odd set of symptoms. I would suggest ruling out any fuel-related issues as the poor fuel economy and lack of power could be related to faulty sensors like the throttle body sensor, mass air flow sensor,...

Q: 1992 Honda Accord cooling fans not operating properly.

Hi there. Your issue is the ECT sensor B is not closing the loop when engaged. There is power to the sensor A from the computer, but the sensor B is not connecting when the vehicle is running hot or...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com