Repair of hidden leak from Coolant Temperature Sensor O-Ring. Easy to do. You could also use these instructions to replace your sensor, if it has completely failed.

Referenced Links:
Bleed Air Link: http://www.youtube.com/watch?v=AwFToKdE4Mc&feature=fvwrel
Reset Warning Light Link: http://www.youtube.com/watch?v=k3GiIdy5Dto

Lost the vid file, so typos at no extra charge.

The video shakes, because the camera shakes. The camera shakes, because I shake. :-P

Please be kind with your words. Profanity is not acceptable.

I am not a mechanic. You assume the risk of attempting the repair.