Fixing P0128 on Mazda 3 with 2.0l (or 2.3l) engine - Thermostat sticking open

Hey, y'all!!
This is a super quick video about the OBDII Code P0128 on a 2006 Mazda 3. This code is set when the engine (coolant temperature) has not reached operating temperature within a specific amount of time after engine startup. This almost always corresponds to a sticking thermostat in these cars, but in some rare cases may also be associated with the engine coolant temperature sending unit/sensor. ALWAYS PERFORM DIAGNOSIS before randomly replacing parts.
As you can see in this video, this thermostat was most definitely sticking open.
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