Jeep J20 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 Jeep J20 Engine Coolant Temperature (ECT) Sensor Replacement is $121 with $26 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1984 Jeep J20V8-5.9LService typeEngine Coolant Temperature (ECT) Sensor ReplacementEstimate$258.95Shop/Dealer Price$304.94 - $420.41
1975 Jeep J20V8-5.9LService typeEngine Coolant Temperature (ECT) Sensor ReplacementEstimate$238.95Shop/Dealer Price$284.96 - $400.44
1976 Jeep J20V8-6.6LService typeEngine Coolant Temperature (ECT) Sensor ReplacementEstimate$238.95Shop/Dealer Price$284.96 - $400.44
1985 Jeep J20V8-5.9LService typeEngine Coolant Temperature (ECT) Sensor ReplacementEstimate$147.75Shop/Dealer Price$170.94 - $218.00
1986 Jeep J20V8-5.9LService typeEngine Coolant Temperature (ECT) Sensor ReplacementEstimate$238.95Shop/Dealer Price$284.97 - $400.47
1980 Jeep J20V8-5.9LService typeEngine Coolant Temperature (ECT) Sensor ReplacementEstimate$238.95Shop/Dealer Price$284.96 - $400.44
1977 Jeep J20V8-5.9LService typeEngine Coolant Temperature (ECT) Sensor ReplacementEstimate$243.95Shop/Dealer Price$289.82 - $405.20
1974 Jeep J20V8-6.6LService typeEngine Coolant Temperature (ECT) Sensor ReplacementEstimate$243.95Shop/Dealer Price$290.19 - $405.86
Show example Jeep J20 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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Luis

12 years of experience
78 reviews
Luis
12 years of experience
Jeep J20 V8-6.6L - Car is not starting - Los Lunas, New Mexico
great

Chester

14 years of experience
14 reviews
Chester
14 years of experience
Jeep Liberty V6-3.7L - Brake Pads Replacement (Rear) - Saint Louis, Missouri
Had a brake job done. Chester was on time and did the job no problem on a cold day. Good man and good mechanic.

Travis

13 years of experience
160 reviews
Travis
13 years of experience
Jeep Grand Cherokee V6-3.6L - Thermostat - Charlotte, North Carolina
Really informative. Worked quickly and effectively. Would request Travis for future work.

Robert

22 years of experience
296 reviews
Robert
22 years of experience
Jeep Wrangler V6-3.6L - Car Thermostat Replacement - Bedford, Texas
Very nice and professional.

Excellent Rating

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Rating Summary
6,383
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97
6,383
186
36
24
97
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