Question about 1999 Cadillac DeVille

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What is the easiest way to remove and replace the engine coolant temperature (ECT) sensor on a 99 Cadillac Deville, 4.6L

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  • kellywlsn239 Aug 12, 2010

    where is it located? is it easier to get to it from the top or the bottom?

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Disconnect the negative battery cable.
Pull the harness of the sensor.
Drain about 1/4 of the radiator fluid.
Place a rag under the sensor and use a wrench to remove and replace the sensor.

Posted on Aug 12, 2010

Testimonial: "reply was really fast, answer was very basic but needed to know how to get to the harness of the sensor "

  • Nate Stansfield
    Nate Stansfield Aug 12, 2010

    From the top. It is located on or next to the thermostat housing. Just follow the upper radiator hose and it will lead right to the thermostat housing. On or next to the housing is the temp sensor.

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What does code P 119 mean on my Cadillac 1994 Seville STS


P0119 Cadillac Engine Coolant Temperature Circuit Intermittent
Possible causes - Low engine coolant level
- Faulty Engine Coolant Temperature (ECT) sensor
- Faulty engine coolant thermostat
- Engine Coolant Temperature (ECT) sensor harness is open or shorted
- Engine Coolant Temperature (ECT) sensor electrical circuit poor connection What about the obd code? The Engine Control Module (ECM) detected an erratic signal from the engine Coolant Temperature (ECT) sensor during the system monitor test Symptoms - Engine Light ON (or Service Engine Soon Warning Light) P0119 Cadillac Description The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the Engine Control Module (ECM). The modified signal returns to the ECM as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.
P119 or P0119 ?

P119 - Shorted Fuel Injector Problem
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1 Answer

Will etc sensor cause overheating in northstar


If you mean ECT (Engine coolant temperature) sensor, yes it can.
The ECT is responsible for turning on & off the radiator cooling fan.
However an ETC (Electronic traction control) sensor typically wouldn't cause the engine to overheat. However if there is a code in the engine computer it can turn off the traction control. So if the ETC is turning off it may be a result rather than a cause.
You'll need to check for codes in the engine computer & if there is one for the temperature sensor you most likely will need to replace it but you'll also need to check the coolant level. If it is low you obviously have a leak.
FOOT NOTE: This engine is well know for its HEAD GASKETS leaking coolant. If you are having persistent overheating conditions & can't seem to locate the cause ie; water pump, radiator, hose ect. you most likely will need to have the head gaskets replaced... & that isn't cheap.

Hope this helps.
FarrouT!

Jul 09, 2014 | 1999 Cadillac DeVille

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Coolant sensor


Try looking screwed into the radiator.

Jun 23, 2014 | 1994 GMC Sierra

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I need help finding the coolant temp sensor can u please help me


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

NOTE The engine coolant temperature sensor is located on the intake manifold water jacket or near the thermostat housing. On the 4.6L engine, the coolant temperature sensor is located on the rear cylinder head, at the cruise control servo bracket. It is necessary to drain coolant from the cooling system to a level below the sensor, prior to sensor removal.
  1. Disconnect the negative battery cable.
  2. Drain the coolant level below the height of the ECT and recycle the engine coolant.
  3. Detach the electrical connector at the sensor.
  4. Remove any obstruction to access the ECT.
    1. On the Catera, this would include removing the intake plenum and the intake bridge.

  5. Using a deep well socket, remove the sensor.

To install:
  1. Coat the threads of the new sensor and install it in the engine. Tighten to 15 ft. lbs.
  2. Install the electrical connector.
  3. Refill the system with coolant.
  4. Connect the negative battery cable.

May 18, 2013 | 1998 Cadillac DeVille

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Failed ect sensor thermostat reading over 270f


It means you should try replacing the engine coolant temperature sensor as it has probably failed (it's located on the driver's end of the engine at the middle about half way down).

Jan 25, 2018 | 1996 Cadillac DeVille

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Location of cooling fan sending unit 1999 cadillac deville?


If you are refering to the Engine Coolant Temperature (ECT) sensor,it is located on the right rear of the engine below the exhaust gas recirculation (EGR) valve.

HINT: If your Deville is equipped with the analog instrument cluster and the temperature gauge is working, or if you have the digital instrument cluster and the driver information center (DIC) has been diplaying messages telling you that the engine is hot, the problem with your engine cooling fans is NOT the sensor.

Jun 02, 2012 | Cars & Trucks

1 Answer

Where can i find the ect sensor on my 1999 cadillac deville


Click over pic for zoom...

zjlimited_1119.jpg

Fig. Showing the location of MAP Sensor and other components on the front of the engine: 1. Manifold Absolute Pressure (MAP) Sensor; 2. Idle Air Control (IAC) Valve; 3. Engine Coolant Temperature (ECT) Sensor; 4. Throttle Position (TP) Sensor

zjlimited_1120.jpg

Fig. Engine coolant temperature sensor (1).

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1 Answer

Trouble locating cooling sensor on 2003 gmc envoy


4.2L Engine To Remove:
  1. Disconnect the negative battery cable from the battery.
  2. Drain the coolant from the engine.
  3. Disconnect the engine coolant temperature (ECT) sensor connector. Engine coolant temperature sensor removal and installation gm-04-42-1509.gif

  4. Remove the engine coolant temperature (ECT) sensor from the engine.
To Install:
  1. Apply thread sealer P/N 12346004 or equivalent to the engine coolant temperature (ECT) sensor threads.
  2. Install the engine coolant temperature (ECT) sensor into the engine. Torque the sensor to 12 ft-lb (16 Nm).
  3. Connect the engine coolant temperature (ECT) sensor connector.
  4. Refill the engine with coolant.
  5. Connect the negative battery cable to the battery.
5.3L & 6.0L Engines To Remove:
  1. Drain the coolant from the engine.
  2. Disconnect the engine coolant temperature (ECT) sensor connector. Engine coolant temperature sensor removal and installation removeect.gif

  3. Remove the engine coolant temperature (ECT) sensor from the left cylinder head.
To Install:
  1. Apply thread sealer P/N 12346004 or equivalent to the engine coolant temperature (ECT) sensor threads.
  2. Install the engine coolant temperature (ECT) sensor into the left cylinder head. Torque the sensor to 15 ft-lb (20 Nm).
  3. Connect the engine coolant temperature (ECT) sensor connector.
  4. Refill the engine with coolant.

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1 Answer

Location of coolant temperature sensor


Maybe this will help . although this is from a 1997 Caddy.


Cadillac DeVille Engine Coolant Temperature (ECT) Sensor Location62451583.gif

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