Question about 2002 GMC Envoy

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Where is the external temp sensor that affects the ac located?

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In front of motor take grill off (snaps on and off) look at top a radiator for wires (not connected to radiator)

Posted on Oct 06, 2009


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Heat temp gauge on motor if faulty can it effect the cooling temp of the air conditioning on a saab 93 convertible 2002 model

No. The engine temp sensor affects engine idle speed, and timing. There is an in car temp sensor that controls the position of the blend door and the fan speed if the system has automatic temperature control.It also cycles the AC compressor clutch and the radiator cooling fans.

Dec 22, 2016 | 2002 Saab 9-5

1 Answer

How long for the ac fan to start working? Ive noticed that the fan does not work when i turn the ac on, can this cause my car to overheat. I check the temp and coolant liquid both seems fine.

the ac fan starts as soon as the ac is switched on
the fan is provide cooling of the condenser before the radiator to prevent high head pressures in the ac compressor
it is the fan at the front of the car mand does not affect engine temp
there is a radiator fan between the engine and the radiator that will not start until the coolant temperature reaches a set temp at which point the ECM switches that fan on
if that fan is not working when the engine is hot , check for fan, coolant temperature sensor switch , fan relay, fuses or problem ECM

Jan 13, 2016 | AC Cars & Trucks

1 Answer

My external temp. gauge is reading 1 degree when its hot outside. where is the ambient temp. sensor located and can it be changed by myself?

The external temperature sensor is usually located directly behind the grille and in front of the radiator. It should be relatively easy to find because it will be the only thing in that area with wires.

May 24, 2015 | 2002 Chevrolet TrailBlazer

3 Answers

Where do I locate the collant temp senor that connects to computer system. Radiator fans not coming on and code indicates low coolant temp, but dash temp gage reads actual temp

Hi standing in front of the car looking at the engine it's on the top right side of the engine,next to the top radiator hose inlet.

3.4L Engine

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

  1. Drain the coolant below the level of the Engine Coolant Temperature (ECT) sensor.
  2. Disconnect the sensor electrical connector.
  3. Carefully remove the ECT sensor.

    0996b43f80205354.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Removal and installation of the coolant temperature sensor

To install:

NOTE Replacement components must be the correct part number for the application. Components requiring the use of the thread locking compound, lubricants, corrosion inhibitors, or sealants are identified in the service procedure. Some replacement components may come with these coatings already applied. Do not use these coatings on components unless specified. These coatings can affect the final torque, which may affect the operation of the component. Use the correct torque specification when installing components in order to avoid damage.

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

  1. Coat the threads with sealer P/N 9985253 or equivalent.
    NOTE Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
  2. Install the ECT sensor and tighten the sensor to 15 lb-ft (20 Nm).
  3. Connect the ECT sensor electrical connector.
  4. Refill the cooling system

Hope this helps,Thank You for using fixya..iluv2fish....Ray....

Jul 10, 2010 | 2001 Pontiac Aztek

1 Answer

AC not working in 2007 Passat. Was told the compressor is good ad plenty of refrigerant but blows only hot air. One day it was good the next day it was not. Shawn Phipps

I had the same problem with my 2007 passat. The external ait temperature sensor measures the outside air temp and displays this on your dashboard computer. If this sensor is not working properly it can cause your ac to blow hot air. If there is a little snowflake symbol by the air temp on your display that is an indication that this sensor may be bad. Get this sensor replaced and it should fix your problem.

Apr 06, 2010 | 2007 Volkswagen Passat Sedan

1 Answer

What is actual name of external temp sensor

it's called an "in-vehicle temperature sensor" it's located behind the center of the dash


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Apr 16, 2009 | 1997 Buick LeSabre

3 Answers

Air con stops working. seems to be engine temp related but temp is not exesive.

there is no AC temp cut off sensor, it is done (hi engine temp AC cut off) through the PCM (powertrain control module), the PCM uses the signal from the ECT sensor ( engine coolant temperature), if the ECT had a problem the check engine light would be on The most common reason for the ac cutting off is the low pressure cycling switch sticking..
I am a Ford dealer tech and have 20 years in the shop, this answer is 100% correct.

Apr 12, 2009 | 2002 Ford F250 Super Duty SuperCab

1 Answer

The External Temp sensor on my 2004 Kia sorento is inop

External temp sensor is located in front of ac condensor lower part.

Feb 02, 2009 | 2004 Kia Sorento

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