Got the low coolant warning light the other day (yellow light, not red). Checked the tank and the elvel looked fine to me, so its probably either a bad sensor or I've got somehting else going on like a big air bubble or somethign. Where is the sensor and is it testable or jsut replace it and hope for the best?

Not positive, but I think the car had a flush and fill about 20k ago when the dealer did my timing belt.

 

The sensor is on the bottom of the res