The thermostat is located on the top of the engine, where the top radiator hose is connected. The hose has to be disconnected, and the inlet on the engine is removed, with the thermostat underneath.
Replace the cam sensor
It is the two wire sensor near the thermostat housing.
Try in the housing at the engine end of the upper radiator hose
What about it? How to replace it? Replacement cost? Where to buy?
no
No, it is possible to replace them in vehicle.
no
No.
yes
http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c1528021a89b
about $360 at Firestone Car Care
No.