Temperature needle all the way to hot

[dkbjain]

I have a 2001 3.0 liter x5 that had a problem this morning.

The car hadn't been driven for about 2.5 weeks, and the temperature was cold (about 35 F).

The car started right up, but while I was letting it warm up the engine died. So I started it again. It looked like it wanted to die, so I started driving. The temperature gauge read all the way to the left (cold).

About 30 seconds later I noticed that the temperature gauge was all the way to the right (hot). So I immediately turned around and went back home and parked the car.

Since the temperature gauge was on hot, I expected that a coolant hose or something had failed and all the coolant had leaked out. But I didn't see any evidence of coolant leaking out.

I checked on my scanner, and it showed the following codes:
F0 Misfire, cylinder 3
F3 Misfire, cylinder 6
DE Oxygen sensor control not active after specified time

Any guesses as to what happened and how I should proceed?

Thanks.
-Danny