So last weekend I flushed the cooling system, my temp gauge has always been a little off even through torq app says it stays between 179-185 with a 180* tstat and also verified with a thermometer. I also kept getting a low coolant light even though I had plenty of coolant in there and since I am not very trusting of what the previous owners had done, I had noticed green coolant was used and I know some people are stupid enough to mix dexcool and standard coolant.
Well this week the temp gauge was way off and bouncing all over, torq app was saying -32.8*, and I decided to get a coolant temp sensor. Sensor was replaced easily, I bled the system, the fans come on at 180* but the gauge in the car reads anywhere from roughly 200 to 210, yet torq and thermometer both verify the same temps at 179-185.
I have a three wire temp sensor, and my question now is if there is a possibility that there is fault in the gauge. torq uses obd2 so the pcm is showing the correct temp, but the gauge is off by about 20*
