I have noticed my car is running very cold, i thought maybe the thermostat was stuck open, so i replaced it, and its still cold

i checked the plug and its good for the water temp sensor

what could it be?

thanks
richie

 

How do you know it's running cold? Maybe your sensor/cluster took a crap.

 

Could be that the pressure cap is leaking, or the temp sending unit is out of its operating range. Put a multimeter on it, and compare it to factory specs.

Could as well be the gauge itself, so cover all your bases.

 

Check the lower hose while it's warming up and see if it starts to get warm.