I'm not sure on that particular engine but it can be found in water jacket on cylinder head, it should have 2 wires and if you remove it there should be coolant behind it.
The cooling system is the radiator, engine fan, thermostat, and hoses...
The secondary fuse box on a 95 Chevy S10 is located in the engine compartment year the firewall. It controls many of the circuits within the engine compartment itself.
The transaxle is the transmission on a front wheel drive car . It's bolted to the rear of the engine ( in your case completely within the engine compartment )
AC clutch relay is inside the fuse case within the engine compartment.
A 2006 Chevy Impala Lt has a fuse for the windshield washer located in the main engine compartment. It is contained within a water tight box at the right, rear of the compartment.
The engine immobilizer key switch is situated within the glove compartment. where in the glove compartment? there is only the light fixture.
If you are referring to the air intake filter box, it is located within a lblack plastic box mounted in the engine compartment in the area of the the left front fender well.
Left front faring panel, small compartment panel within this panel. Battery lays on it side in this compartment.
when facing the engine, it's screwed into the right side of the intake manifold (big silver thingy with 2.8 numerals) just below those two hoses. On a 2.0 liter engine, the sensor is on the left side (if you're standing in front of the engine) of the intake manifold, which is the aluminum colored metal piece housed within the left side of the engine compartment. It has the Volkswagen logo and "2.0" emblazoned on it. Follow the link below titled Images of a 1997 VW Jetta GL 2.0 Liter Engine Compartment for more.
Where is the clicking coming from? Within the engine compartment or inside the car?
No. The purpose of the cooling agent is to maintain the engine temperature within permissible limits to ensure minimal damage to the engine and avoid overheating. The cooling system cools the engine and reduces its temperature.
There are 2 sensors. One located within the engine compartment mounted on the exhaust pipes next to the engine block. The other is located next to the catalytic converter. As far as the code is concerned, consider taking out the sensor, clean it and reinstall it. Erase the code. Run engine for a couple of days. If the code comes back you should then replace the old sensor with a new one.