Recently this winter ive been getting some wierd gauge readings. sometimes after letting my car warm up for about 10 minutes ill start to drive and when i get down the road i roll up to a stop sign, and as i slow down my engine temp goes all the way to the end of normal on the hot side and my oil temp goes all the way up to the red rectangle. it will still blow cold air out the vents. is this just a sensor glich cuz its pretty cold here in iowa right now and has never done this before. after i leave from the stop and go through the gears normally it returns to normal. anyone have this happen to u? should i b concerned?