What is the ECT? Where is it located? What does

The Engine Coolant Temperature Sensor is located in the coolant pipe, below the air intake pipe and behind the right cylinder head and is integral with the ECT sensor. The Engine Coolant Temperature Sensor is located on the back of the right cylinder head and is integral with the ECT sensor.
https://www.autozone.com/repairguides/Audi-Cars-1999-05/Component-Locations/Engine-Coolant-Temperature-ECT-Sensor/_/P-0900c152801c0f85

the ECT sensor is on top of the coolant manifold.

did you check for underhood diagram?

The ECT sensor is located on the left end of the rear cylinder head.

Automobiles: 2000 Ford Escort ZX2 4-cylinder 2.0L MFI DOHC

NOTE
The "left" side of the engine is the driver's side.

The Engine Coolant Temperature (ECT) sensor is a thermistor (a device which changes resistance or voltage as temperature changes). The sensor detects the temperature of engine coolant and provides a corresponding signal to the PCM (Powertrain Control Module - aka "the car's computer").

The ECT sensor is mounted in the following locations (small Ford engines):

1.8L engines: in the cylinder head
1.9L engines: threaded into the heater hose inlet pipe
2.0L engines: at the left rear of the engine

2.0L Zetec Engine

(1) Partially drain the engine cooling system using a clean container. If coolant is in good condition, retain for reuse.
(2) Disconnect the battery ground cable.
(3) Disconnect the electrical wiring connector from the engine coolant temperature (ECT) sensor.
(4) Remove the retaining clip and the ECT sensor.




Fig. 1 Escort ZX2 ECT sensor - The retaining clip is removed (at the solid arrow). Withdraw ECT sensor by gently wiggling/pulling in the direction of the dashed arrow.

To install:

NOTE
Coat the ECT sensor O-ring with clean coolant prior to installation.

(1) Replace the retaining clip and the ECT sensor.
(2) Connect the electrical wiring connector from the Engine Coolant Temperature (ECT) sensor.
(3) Connect the battery ground cable.
(4) Refill the engine cooling system. An inexpensive plastic "Radiator Funnel" will help with this task.

you have 4.6l engine ect sensor located below the egr valve. now if you have 4.9l engine ect located on the thermostat housing.

Dodge Dakota 3.7L v6:

Fig. ECT sensor location-3.7L, 4.7L engines.

Back to Top Inspect/Test/Replace Because ECT (engine coolant temperature) sensor procedures vary depending upon their location, first locate the part. You may need to partially drain the engine coolant to prevent coolant spillage.

• Disconnect the negative battery cable.
• Unplug the ECT.
• Then, unscrew it.
• Reverse the removal procedures to install the new part.
• Connect the negative battery cable to the battery.

The ECT (Engine Coolant Temp sensor) should be located by the coolant thermostat housing or where the upper radiator hose connects to the engine. It screws in with a plug or small/short wire harness attached to it. -------------------------------- To replace ect sensor:---

1. Drain and recycle the engine coolant.
2. Remove the intake manifold cover, if necessary.
3. Remove the exhaust crossover.
4. Disconnect the Engine Coolant Temperature (ECT) sensor electrical connector.
5. Remove the ECT sensor.

see fig below:---

.Thanks.

The exact locations and picture of Engine Coolant Temp (ECT) sensors on 2004 VW Jetta TDI:

1. ECT sensor 1 placed on cylinder head:




2. ECT sensor 2 placed on the left bottom side of the radiator:

Hi: The engine coolant temp sensor, or ECT is located close to where the upper radiator hose conncects to the engine. It is a hex shaped sensor, with a electrical connector coming straight out from the end.