Just recently purchased an 05 Sierra for next to nothing. I noticed the coolant temp sensor works intermittently. One of the times that the coolant temp sensor wasn’t working I plugged in my obd2 and went to look at the raw temp data. I noticed that while the coolant temp gauge said that the temp was at zero, the raw data was at the normal ~200 degrees.
Does this mean that there may not be something wrong with the sensor itself, but maybe the cluster or something in between the two? I additionally got other codes for a random misfire, knock sensors, and both fuel trims running rich, which I believe are all from the computer thinking the engine runs cold at all times. Another concern I have though is overheating. If the e fans only run when the engine gets warmed up, would they not run because the computer thinks it’s cold?
Thanks for the help