usually on most vehicles it's close to the water outlet housing where the upper radiator hose meets the motor. Actually, on the 1990 for ranger with the 2.3L it's on the driver side of the block, towards the back...under the intake manifold...I couldn't get a look at it from the top but you can see it from the bottom. Also, you may want to drain some water out of the radiator/block or expect to get an anti-freeze bath.
Which engine do you have?
The Cylinder Head Temperature (CHT) sensor for the 2.3L engine is located between the two center ignition coils. The Engine Coolant Temperature (ECT) sensor for the 3.0L engine is located in the intake manifold to the right of the thermostat housing. The Engine Coolant Temperature (ECT) sensor for the 4.0L engine is located in the intake manifold behind the thermostat housing.
The Engine Coolant Temperature sensor can be found near the thermostat housing or close to where the upper radiator hose attaches to the intake manifold. Good luck.
on the front, top of the engine. look near the upper coolant hose on the engine for a sensor with a couple of wires on it. There may be 2 in close proximity that look similar.
The engine coolant reservoir has a thread on cap which is the "radiator " cap for the 4 cylinder engine
on top of the engine on the hose that outlets from the pipe going to the thermostat. it has two spade terminals and is easy to access right there in the middle of the engine bay
The engine coolant reservoir ( which has a 50 / 50 mix of antifreeze and distilled water from the factory ) is located in the engine compartment on the passenger side
On a 2002 Ford Ranger : The check " gage " light comes on if : The engine coolant temperature is TOO HIGH The engine oil pressure is TOO LOW or The fuel gauge is at or near empty
You drain coolant from the radiator. but according to the book ther are two plugs on the engine block that need to drain the coolant from.
The 1998 Ford Ranger Owner Guide shows Ford Extended Life Engine Coolant ( Dexcool )
Where is the temperature sensor on a 2002 2.3l DOHC ford ranger motor? I really need to know so I can replace it. I don't want to get raped by the dealer just to find out where it's at. please help
The check gage light comes on if your engine coolant temperature is high , the oil pressure is low , or the gas tank is almost empty