Symptoms of a Bad or Failing Coolant Level Sensor

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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
2010 Mazda 3 Sport $109 $38.83 $70.00 25% $146.33
2008 Dodge Charger $159 $88.94 $70.00 19% $196.44
2012 Chevrolet Express 3500 $91 $21.08 $70.00 29% $128.58
2011 Infiniti EX35 $159 $88.94 $70.00 19% $196.44
2007 Acura RDX $109 $38.83 $70.00 25% $146.33
2005 Mercedes-Benz CL55 AMG $87 $16.60 $70.00 30% $124.10
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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

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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
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2

Mack

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

Peter

40 years of experience
1059 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
1240 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
18 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

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