Curious about the coolant temperature sensor replacement cost?
Well, it won’t tear a hole in your pocket. However, that doesn’t mean you should put it off for later.
Here’s why: The sensor is a small but vital component that measures your engine coolant temperature and relays this data to the Engine Control Unit (ECU). Without this information, your engine can get severely damaged.
So, let’s break down what you can expect to pay, including the factors that affect the cost. We’ll also dive into some warning signs so you know when your temperature sensor needs replacing.
This Article Contains:
- How Much Does a Coolant Temperature Sensor Replacement Cost?
- Is It Worth Replacing a Coolant Temperature Sensor?
- 6 Signs You Need a Coolant Temperature Sensor Replacement
- How Long Do Coolant Temperature Sensors Last?
- How to Extend the Life of Your Coolant Temperature Sensor
- How to Replace a Bad Coolant Temperature Sensor
How Much Does a Coolant Temperature Sensor Replacement Cost?
Let’s review what you can expect to pay for a coolant temperature sensor replacement.
A. Range
The average cost to replace an engine coolant temperature sensor should be between $400 and $500. This includes:
- Parts: $300 to $325
- Labor: $100 to $175
NOTE: Your labor cost can vary based on location and whether you take your car to the dealership or to an independent mechanic.
B. Factors Affecting Cost
Various factors can influence the cost of replacing a coolant temperature sensor, including:
- Vehicle make and model: Luxury brands may have higher part costs, and the sensor may be difficult to access, increasing the labor charges.
- Quality of the parts: OEM (Original Equipment Manufacturer) parts are more costly than aftermarket alternatives, but they offer better quality and fit your car perfectly.
- Number of sensors: Certain car brands may have more than one coolant temperature sensor, which can increase part and labor costs.
Is It Worth Replacing a Coolant Temperature Sensor?
Absolutely! Replacing a faulty coolant temperature sensor is vital since this small component impacts how efficiently your engine operates.
If this sensor fails, it can send incorrect readings to the Engine Control Unit (ECU) or Engine Control Module (ECM). This can affect how the engine manages critical functions like fuel injection and cooling.
If left unchecked, a faulty coolant temperature sensor can damage vital engine components.
6 Signs You Need a Coolant Temperature Sensor Replacement
Here are some common symptoms that indicate it may be time to replace the sensor:
- Rough idle or poor performance: A coolant sensor malfunction can result in an incorrect air-fuel mixture, causing rough idling, difficulty accelerating, or overall sluggish performance.
- Black smoke from the exhaust: If the faulty sensor causes the engine to run rich, incomplete combustion can create black smoke, especially when accelerating.
- Illuminated Check Engine Light: A malfunctioning sensor may trigger a Check Engine Light and diagnostic codes, like P0118 or P0128. These codes indicate issues related to the engine’s cooling or emissions system.
- Fluctuating temperature readings: Inconsistent readings on your temperature gauge are a common sign of a faulty sensor. If your temperature gauge fluctuates or acts erratically, it’s likely an issue with your temperature sensor.
- Engine overheating: Since the coolant keeps your engine cool, a malfunctioning coolant sensor can cause incorrect temperature readings. This can prevent the Engine Control Unit from properly regulating the cooling system.
- Decreased fuel efficiency: A faulty coolant temperature sensor can send incorrect data to the ECU, resulting in poor fuel economy.
How Long Do Coolant Temperature Sensors Last?
Coolant temperature sensors may last around 100,000 miles.
However, their lifespan can be reduced due to:
- Deposit buildup: Over time, dirt, rust, and other contaminants can accumulate on the coolant temperature sensor. These deposits can interfere with the sensor’s ability to measure the coolant temperature accurately.
- Low coolant level: Driving with a low coolant level can put extra strain on the sensor, causing it to overheat and eventually fail.
- Coolant leak: Leaking coolant can sometimes reach the electrical connectors and damage the sensor or wiring. If coolant seeps into the sensor body, it can disrupt its ability to send accurate data to the Engine Control Module.
- Larger cooling system problems: Cooling system issues, like a damaged radiator or a faulty water pump, can overheat and strain the coolant temperature sensor.
How to Extend the Life of Your Coolant Temperature Sensor
Here are a few things you can do to minimize the risk of premature coolant sensor failure:
- Regular inspections: The best way to keep your coolant temperature in top shape is to catch and address issues like cracks, corrosion, and loose connections early.
- Use the correct type of coolant: The right coolant for your car can vary based on year, make, model, and even where the vehicle was produced. There are three basic types of engine coolant you could choose from:
- Inorganic Additive Technology (IAT): It’s less common in modern cars due to the need for frequent changes, about every 2 years or 24,000 miles.
- Organic Acid Technology (OAT): Often used in GM vehicles, it isn’t compatible with all manufacturers and typically requires replacement every 5 years or 50,000 miles.
- Hybrid Organic Acid Technology (HOAT): It combines the benefits of IAT and OAT fluids. HOAT is most commonly used in Ford and Chrysler vehicles and needs to be changed every five years or 50,000 miles.
- Cooling system maintenance: Proper maintenance of your car’s cooling system extends the life of the temperature sensor. This includes flushing the system regularly, promptly addressing leaks, and ensuring fluid levels are always topped up.
How to Replace a Bad Coolant Temperature Sensor
It’s best to leave this job to a mechanic, as they have the right tools and expertise to properly diagnose and replace the sensor without causing further damage.
Still, here’s a brief guide on how a professional technician would replace the coolant temp sensor:
- Hot coolant can cause serious injuries, so the mechanic will let the engine cool completely before starting work.
- They’ll disconnect the negative battery terminal to be on the safe side.
- The mechanic will confirm if the temperature sensor is faulty by using an OBD-II scan tool to check for diagnostic codes like P0115, P0118, or P0128.
- They’ll locate the sensor. It’s usually around the engine block, cylinder head, or thermostat housing, but it can vary depending on the vehicle’s make and model.
- Most coolant sensors are located on top of the engine, so there will be minimal coolant loss when replacing the temperature sensor. However, if it sits lower, the mechanic may drain the old coolant first.
- The coolant temperature sensor is usually connected to two electrical connectors secured by a safety clip or threaded housing. The mechanic will release the clip or remove the housing to disconnect the old coolant sensor.
- After removing the old sensor, they’ll install the new one, taking care not to damage the threads or the sensor itself.
- Once the new sensor is secure, the mechanic may top up the coolant if needed.
- They’ll then test the thermostat readings and coolant temperature, while also checking for leaks.
Get Expert Coolant Temperature Sensor Replacement with AutoNation Mobile Service
Replacing a failing sensor doesn’t have to be a hassle. Whether fixing an issue with your cooling system or ensuring everything’s in top shape, an expert mechanic makes all the difference.
That’s why it’s best to leave it to the technicians at AutoNation Mobile Service.
We’re a mobile auto repair solution that offers upfront pricing and easy online booking. All our services come with a 12-month, 12,000-mile warranty.
Contact us today, and we’ll replace your coolant temperature sensor right from your driveway.