Toyota Prius Engine Coolant Temperature (ECT) Sensor Replacement at your home or office.

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Engine Coolant Temperature (ECT) Sensor Replacement Service

How much does a Engine Coolant Temperature (ECT) Sensor Replacement cost?

On average, the cost for a Toyota Prius Engine Coolant Temperature (ECT) Sensor Replacement is $167 with $72 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2005 Toyota PriusL4-1.5L HybridService typeEngine Coolant Temperature (ECT) Sensor ReplacementEstimate$258.95Shop/Dealer Price$304.94 - $420.41
2004 Toyota PriusL4-1.5L HybridService typeEngine Coolant Temperature (ECT) Sensor ReplacementEstimate$238.95Shop/Dealer Price$284.96 - $400.44
2013 Toyota PriusL4-1.8L HybridService typeEngine Coolant Temperature (ECT) Sensor ReplacementEstimate$238.95Shop/Dealer Price$284.96 - $400.44
2012 Toyota PriusL4-1.8L HybridService typeEngine Coolant Temperature (ECT) Sensor ReplacementEstimate$238.95Shop/Dealer Price$284.94 - $400.40
2009 Toyota PriusL4-1.5L HybridService typeEngine Coolant Temperature (ECT) Sensor ReplacementEstimate$238.95Shop/Dealer Price$284.97 - $400.47
2011 Toyota PriusL4-1.8L HybridService typeEngine Coolant Temperature (ECT) Sensor ReplacementEstimate$238.95Shop/Dealer Price$284.96 - $400.44
2017 Toyota PriusL4-1.8L HybridService typeEngine Coolant Temperature (ECT) Sensor ReplacementEstimate$243.95Shop/Dealer Price$289.82 - $405.20
2008 Toyota PriusL4-1.5L HybridService typeEngine Coolant Temperature (ECT) Sensor ReplacementEstimate$243.95Shop/Dealer Price$290.19 - $405.86
Show example Toyota Prius Engine Coolant Temperature (ECT) Sensor Replacement prices

What is the Thermostatic Vacuum Sensor all about?

When the engine is started cold, it takes several minutes to reach operating temperature which is when the engine is running most efficiently. Vacuum is created whenever the engine is running and can be used to control one or more auxiliary vehicle options such as heater controls or cruise control, and is also used to control emissions systems such as exhaust gas recirculation, or EGR. It also controls vacuum for the distributor to advance or retard the spark, ensuring the engine runs as smooth as possible. Vacuum is supplied to these systems through hoses routed in the engine compartment. If engine vacuum was supplied to the EGR system when the engine was still cold, the engine would stumble or stall, and would do so until it reached operating temperature.

The thermostatic vacuum sensor is mounted in the intake manifold and uses coolant temperature to determine when the engine has reached operating temperature. Once it has warmed up, the thermostatic vacuum sensor opens and allows vacuum to flow through it to the vacuum-operated functions it controls. If the thermostatic vacuum sensor fails in the open position, it can be difficult to start the engine when it is cold and will run poorly until it warms up. If the vacuum sensor fails when it is closed, it may start properly but will lose power and run poorly at warm temperatures. It will burn fuel poorly, creating higher exhaust emissions that may fail a smog check. The engine light likely will come on when the vacuum sensor fails.

Keep in mind:

  • The thermostatic vacuum sensor is part of an emissions control system and is required to operate wherever emissions or smog regulations are enforced.

  • Any leaks in the vacuum system can mimic the symptoms of a failed thermostatic vacuum sensor. Diagnosis by a professional mechanic is the best way to confirm failure.

How it's done:

  • The vehicle battery is disconnected and the air cleaner top is removed for access
  • The defective thermostatic vacuum sensor is removed
  • The new thermostatic vacuum sensor is installed and the battery is reconnected
  • The engine is started and the thermostatic vacuum sensor is checked for operation
  • The air cleaner is reinstalled, repair is verified and the vehicle is road tested for proper operation

What common symptoms indicate you may need to replace the Thermostatic Vacuum Sensor?

  • The Check Engine light is on
  • Engine runs poorly on initial startup until the engine warms up
  • Engine stumbles, stalls, or has a lack of power when hot
  • Vehicle fails smog check

How important is this service?

The thermostatic vacuum sensor is an important part of the vacuum system that allows the engine to run smoothly and efficiently. If it is not working properly, your engine can stall or not start and you can be stranded in an inconvenient or dangerous situation. Have it checked and replaced by a licensed mechanic as soon as possible.

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Andrew

11 years of experience
845 reviews
Andrew
11 years of experience
Toyota Prius L4-1.5L Hybrid - Battery - Kansas City, Kansas
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Carlos

17 years of experience
225 reviews
Carlos
17 years of experience
Toyota Prius L4-1.5L Hybrid - Pre-purchase Car Inspection - Van Nuys, California
Carlos worked with me to do a pre-purchase inspection of a used car that was located quite far from my home but fit my needs and was priced for my budget. Rather than going to see the car in person first and taking it to a new mechanic for inspection near the seller - while also running the risk of traveling for nothing if it wasn't up to standards - Carlos first visited the seller for me and prepared an extensive report. He took photos and voice notes and spoke with me over the phone about the shape of the vehicle and any possible upcoming service needs. He answered my many questions and was very knowledgeable about the car and my needs. I would recommend him to anyone who needs auto service.

Rusty

23 years of experience
514 reviews
Rusty
23 years of experience
Toyota Prius L4-1.8L Hybrid - Oil Change - Arlington, Texas
Always professional.

Diego

21 years of experience
564 reviews
Diego
21 years of experience
Toyota Prius L4-1.5L Hybrid - Strut Assembly Replacement (Rear) - Phoenix, Arizona
Excellent from start to finish!

Excellent Rating

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1,141
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