Good news just got the ECT sensor replaced, but once it was replaced it. I was driving down the street & I notice the tempature starting flying up (it went over 210), but when I stopped at a stop sign it quickly went down to about 170. I cut the car off & immediately start it back up. Then I drove it home (about a 30 minute ride) the temperature read normal. The car was barely even running for 5 minutes when this happened.
Second Time:
I disconnected the battery, to reset the ECT code (I dont think he reset the battery) & it did the exact same thing again. I am confused, what could this be. Could it be the PCM recalibrating the tempature .. I am confused & worried lol. I checked the oil & it was still clean, but has a few small bubbles. Although I check it when the engine was warm