Engine coolant temperature sensor location for replacement?

Tiny
ANONYMOUS
  • MEMBER
  • 2005 CHEVROLET CAVALIER
  • 110,000 MILES
Where is the location of the coolant temperature sensor?
Monday, March 25th, 2013 AT 1:29 AM

7 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Here is a guide to help you step by step with instructions in the diagrams below to show you how on your car. I have found a diagram and a guide for you to help you get the coolant temperature sensor changed out.

https://www.2carpros.com/articles/coolant-temperature-sensor-cts-replacement

Here is what is will be like on your car. (below). Please let us know if you need anything else to get the problem fixed.

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Tuesday, August 22nd, 2017 AT 8:43 PM
Tiny
DALE.WILLIAMS72
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  • 1 POST
  • 2001 CHEVROLET CAVALIER
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 300,000 MILES
Coolant temperature sensor, how to replace it.
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Thursday, July 1st, 2021 AT 11:17 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
REMOVAL PROCEDURE

NOTE: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
Turn OFF the ignition.
Drain the coolant system to below the ECT sensor. Refer to Draining and Filling Cooling System in Cooling System.
Disconnect the Engine Coolant Temperature (ECT) sensor electrical connector.
Carefully remove the ECT sensor.
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Thursday, July 1st, 2021 AT 11:17 AM (Merged)
Tiny
JOHNCATALINA
  • MEMBER
  • 1 POST
  • 1998 CHEVROLET CAVALIER
  • 2.2L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 125,000 MILES
When it is below 40 degrees it will not start but at 50 degrees or warmer it starts.
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Thursday, July 1st, 2021 AT 11:18 AM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

The one sensor that is temperature variant is the coolant sensor. That tells the PCM the engine temperature and adjusts the fuel mapping accordingly.

This may be the issue but needs to be verified by using a scan tool and monitoring the temperature being sent to the PCM.

Roy

REMOVAL PROCEDURE

NOTICE: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.

1. Turn the ignition switch OFF.
2. Relieve the coolant system pressure.
3. Disconnect the ECT sensor electrical connector.
4. Carefully back out the ECT sensor.

INSTALLATION PROCEDURE
1. Coat the threads (only) with sealer.
2. Install the ECT sensor. Tighten the ECT sensor to 25 Nm (18.5 lb. Ft.).
3. Connect the ECT sensor electrical connector.
4. Refill the engine coolant system.
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Thursday, July 1st, 2021 AT 11:18 AM (Merged)
Tiny
GOATMASTER84
  • MEMBER
  • 1 POST
  • 1998 CHEVROLET CAVALIER
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 125,000 MILES
If outside temperature is less than 75 degrees the car will not start. If I open hood and let the sun shine on the engine for a good time it will. I'm assuming a sensor, but no idea which one or where it is.
Thank you.
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Thursday, July 1st, 2021 AT 11:18 AM (Merged)
Tiny
KEN L
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Let's start with are you getting fuel pressure? It sounds like the coolant temperature sensor could be shorted. Here is a diagram of where it is located. Please let me know how it goes.
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Thursday, July 1st, 2021 AT 11:18 AM (Merged)

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