Where is the engine coolant temperature sensor located?

ECT 2 is hidden underneath. You need to drain the coolant, lift the car, remove the undercar shield. Then look up on the back side of the radiator to find it.

It is connected, how do i check if it's the wire or the sensor?

Easy, plug in the scan tool and look at the coolant temperature for ECT2 Then unplug the sensor. It should show a big change if the sensor wiring is good. Most drop to -40 when unplugged and if you short the two pins it should read like 300 degrees.

I took a scan earlier; this means this is not connected, correct? Weird, am almost sure all wires are connected.

I found it, stuck underneath the radiator, same connector same color as the one i plugged into it, so i plugged the right one and now code is gone, but there is an exact looking connector that also plugs in somewhere, black with 2 wires with a rubber protective around it, green and silver wiring that i don't know where it goes. It extends 6 inches in length.

Well, I see a green and gray that is for transmission fluid temperature in that area. ECT 2 should be a light blue and a dark blue.

Okay, let me look for a fluid temperature sensor.

Everything is meant to be, lol, looked and looked and then decided to remove the wheel again, and then right there in my office hidden on bottom of the transmission by the engine mount. The important thing is that this allowed me to see that i have forgotten to tighten the bolts on that mount because i wanted to keep it till the end, all 4 bolts on that mount were loose, strange things happen for a reason, thanks for your help.

Good to hear. Yeah there have been times that I'll start connecting things and find the loose bolt or connector that is damaged, normally the loose ones happen just before lunch...

Lol