Hello all,
this is my first post in club Lexus and I am hoping I found the correct place for my question to be answered.

I drive a 2016 is200t.
Just hit 20k miles.

Recently I started getting a message that my engine coolant temperature is high. Obviously it wasn't a joking matter and I started looking what it could be.

From my observations the message only stays on the screen for about 3-5 seconds and then the gauge shows that the temperature is back to normal.

I have a feeling that engine coolant sensor sensor is tweaking because there is no way engine coolants temperature can cool down that much in 5 seconds.

My question in, does anyone know what could be the issue or my observations are correct?
Also I am having difficult times locating the sensor.

I will pleased to hear anything on this matter.

 

Personally, I wouldn't even bother trying to diagnose and I'd just make a service appointment, assuming you're still under warranty.

 

 

Yes lol
As stupid as it sounds I just had to add coolant

Bought mine from AutoZone, I believe it was a pink color.
Check how much there is in both of your reservoirs.

Should be a very easy fix.

 

Did you find out the problem? I have a same car and problem as your, but my is 30k miles. thanks.

 

Just wanna ask as I am going to change my coolant soon, is our 3IS coolant system "self-burping"? Thanks..