Temp sending units in general (not always) are usually found close to the thermostat.
the temperature sending unit is right under the throtle body .
Temperature Gauge Sending Unit The sending unit is located in the front section of the intake manifold in the vicinity of the thermostat.
had a problem with my 2001 impala 3.8. dealer said it temperature sending unit, then water pump neither fixed the problem. finally replaced the thermaostat and that worked. don't know if that is your problem but may be something to think about.
The water temperature sending unit is on the front of the engine. It is next to the top water hose inlet connection.
On a 2001 Mazda Miata, the temperature sensor, also known as the coolant temperature sensor, is located on the engine block. Specifically, it is typically found near the thermostat housing, on the cylinder head. This sensor monitors the coolant temperature and sends the information to the engine control unit (ECU). If you're looking for it, you may need to access it from the top of the engine bay.
The temp sending unit may be unplugged or faulty.
How to replace a starter on a 2001 Mazda Tribute?
Where is the thermostat located in a 2001 Mazda mpv
How do you replace a fuel injector on a 2001 Mazda mp
Need visual diagram wiring for 2001 Mazda tribute
It is on the dash in front of the steering wheel,it looks like a small black bump.
A 2001 Mazda 626 V6 - 4.2 quarts A 2001 Mazda 626 4 cylinder - 3.7 quarts