Same. Any tips to get the threads started?

@goldfish02rex, can you describe what you mean by "depressing the little harness clip"? i'm attempting this fix right now on my 2017 Acadia. I bent the end of a coat-hanger and was able to pull the red locking tab all the way up, but I cannot figure out how to get the connector off the sensor without breaking it.

@@jmlemay2007 did you ever find out how to remove clip without breaking it

A small piece of paper towel inside the socket itself really helps the new sensor stay in the socket while threading it in!

The thermostat can also cause this code. The video on how to replace that is also posted. If the thermostat fails, it is supposed to be reported by the coolant temp sensor. If the temp sensor fails, it reports the same failure code. Best of luck!

@@Mil-usos i changed it this morning. Dental pick to pull safety tab long needle nose to pull plug and 15mm 3/8 and adaptor and swivel. Also pulled the egr line. 30min job. Have a good flashlight and patience.

Thank you I just solved my problem

So was it the sensor or thermostat that fixes the problem?

On these, it's been the thermostat in most of the cases. I did both the thermostat and the sensor since the sensor was low cost anyway. Haven't had a problem since.

​@@daquezada9 just change thermostat. When it fails it is stuck open, the engine never warms up, the control module sees temperature as invalid so temp Guage is turned off radiator fan on high. your temp sensor has not failed it's just being ignored

How do you get the plug out

Yeah, he broke the plug….good luck

Great question! Here's what I understand: 1: Thermostat starts to fail, the failure is detected by the coolant temp sensor and tells the ECU "Yo, we got a P0128." 2: sensor malfunction Coolant temp sensor is acting up and one of it's tantrums is to lie to the ECU by telling it "Yo, we got a P0128." Other causes that can trigger P0128: Low coolant Clogged cooling system part (usually a radiator) The most "likely" cause for these specific engines has been the thermostat. Best of luck!!!

From other videos, it is the same clip as the others at the front of the engine. Pull up a little on the red clip, then push the tab to open the lock and pull off.

I did a top off and burped the system. No issues came if it. It was a small amount.

Let me know what you find out

Usually if just the sensor doesn't cure the problems, the thermostat also needs to be replaced.

I had to clear the codes for engine light to go off and it didn't come back on after fixing the sensor

Yes, yes it does. If the problem comes back, you also need to replace the thermostat. Most replace both at the same time for good measure.

On an engine that's cold, others have reported (in these comments too) that about a cup or less of coolant is lost, and it doesn't spray.

Good question. To get rid of any pockets of air that may be in the cooling system, you can "burp" the cooling system. There are a few ways to do it depending on the tools you have available. Find the method that works best for.

Great question, I don't remember 🤦 I have an advanced scanner, so that's not something I usually look at.

1/4

As a matter of fact it did! It's been 3 weeks with no issues since replacement.

@@Mil-usos just swapped it out. So far it’s perfect. Took it for a test drive. So I tried to drain some of the fluid through the radiator drain plug. I twisted it 90 degrees. Not a drop. Ended up creating a mess like u did when I took the faulty sensor out. I could not find a radiator cap on top of the radiator. Any idea? Regardless, no symptoms as previous. No “driver assistance…” warning, temperature control is working, engine temperature gauge is working.

Having this same issue...just got it back from the shop for the same thing...they replaced thermostat and ECT sensor....but throwing the P0119 and P0118...nothing about thermostat so I am going to attempt to change the ECT again. Hopefully I can do it

@@CoastieGaming so the symptoms came back to my truck this past weekend. Took it to the dealership. Apparently I still have warranty. They are going to replace the thermostat. I’ll see if that finally fixes my truck for good…. My truck never displayed any codes though. Just symptoms. Temp gauge not working, driver safety assistance not working, cabin temperature control not properly working.

@@favioalvarez2770 originally we had the codes for the thermostat and cooling temp sensor so that is what was changed under warranty. Now it's just coolant temp sensor. Your video makes the sensor seem pretty easy to change so I am going to try. We just don't have time for the car to go back to the shop.

When 1st filming this, I began to tear everything apart. It wasn't till way later in the processes that I discovered it could be done without all the shenanigans. Someone else commented and tried this method and it did work for them without removing it shifting things around. I edited the video as best I could to get to the point without having to re-shoot the whole thing.

I was wondering if that could be done without removing intake thanks very helpful video

Correct. If just swapping out the sensor doesn't alleviate the symptoms, then the thermostat need to be swapped too.

@@Mil-usos ok thanks alot. Do u happen to know if the 2018 is the same as the 2019?

@@travisswiley7663 Yessir... same same

@@Mil-usos perfect thanks alot

I don't recall it being crazy at all. Little to no fight if I recall correctly.

@@Mil-usos thanks. Gonna give it a go.

Replacing the sensor with the new one took the most time for me. At first I tried the old hose trick like you can do on a recessed spark plug. But the 5/8 vinyl hose was too thick to be flexible. Eventually I started it carefully with a flat blade screwdriver in the sensor connector port. I put some tape around the screwdriver blade to prevent it from going in too far and bending the sensor pins. (Ask me how I know!). Be aware the the sensor mounting surface is not horizontal. It tilts to the rear of the SUV, so you need to match the angle when starting the thread. Once I was sure it wasn't crossthreaded, I used the 1/4" drive 15mm socket to tight. The torque for the sensor is 80 inch pounds- not 80 foot pound like someone said in another video.

You're not wrong. I filmed both of these separately mainly because the thermostat was on a ridiculous backorder time frame at the time. Otherwise, it would've been one video.