Ect sensor location 05 pontiac g6 3.5L - 2005 Pontiac G6

This sensor mounts on the front of the vehicle, behind the front bumper, on the frame rail.

2006-2008 Pontiac Grand Prix Front Airbag Air Bag Sensor ...

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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

What engine ? could have come with 9 different one's .
Engine Coolant Temperature (ECT) Sensor (LY7)
In the engine compartment, in the left side of the left cylinder head, between cylinders 2 and 4

Engine Coolant Temperature (ECT) Sensor (L76)
Left front of the engine above the spark plug 1

Engine Coolant Temperature (ECT) Sensor
At the rear of the engine cylinder head, below the brake master cylinder

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

For 1997 Pontiac Sunfire 2.2L SFI OHV 4cyl the Coolant Temperature Sensor is located under hood, driver side, upper engine area, below valve cover, mounted in cylinder head.



Fig. 1: The ECT is also the temperature sending unit for the gauge on the instrument cluster

Hope helps (remember to rate this answer)..

The sensor is threaded into the pipe shown below. Please let us know if you have more questions.

2.2L Engine

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

1. Turn OFF the ignition.
2. Drain the coolant system.
3. Disconnect the Engine Coolant Temperature (ECT) sensor electrical connector.
4. Carefully back out the ECT sensor.

Fig. Coolant temperature sensor for the 2.2L Engine

To install:

1. Coat the threads only with sealer P/N 9985253 or an 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 ECT sensor to 18.5 ft. lbs. (25 Nm).
3. Connect the ECT sensor electrical connector.
4. Refill the engine coolant system.

According to mitchell on demand there is no low coolant tep sensor, only standard ECT sensor.

no just lower the level or be quick about plugging in the new sensor, that is what I do, u may lose a cup of coolant but much less hassle than draining the radiator.

on right side of engine between valvle cover and intake (#8)

1. Turn OFF the ignition.
2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle.
3. Drain the engine coolant below the level of the ECT sensor. Refer to Draining and Filling Cooling System in Cooling System.
4. Lower the vehicle.
5. Disconnect the electrical connector from the ECT sensor