The first time it did this was right after changing the oil last week. I got the oil changed and fired up the car and let it warm up for a few minutes (i went in the house) and then took off down the road and cycled through the guages reseting the max read readings and when i recalled the exhaust temperature guages max reading it had read maximum (12) and at the time was reading 5 while driving down the road. I reset it and kept an eye on it and it never read more than 7. I always reset it when i park it. Then today, the same deal, i let the car warm up while I went back in the house and got going down the road and it again had read max at some point while idling in the driveway. Any help would be appreciated.