I have a 1999 Protege with a temp gauge problem. Once the car has fully warmed up (it has great heat) and the car is driven in outside temps below 40 degrees Fahrenheit, the temp gauge drops to cold. As part of the emissions monitoring, the auto trans will then come out of overdrive. If I stop and let the temp gauge come back to operating temp I can start all over again. SO, driving in cold weather I can not tell if the car might overheat or what is the real engine temperature.

Has any one had this problem? Any help appreciated

 

29 degrees this morning; temp gauge stayed on cold but the car had good heat. Any idea why the gauge does not show correct temp? The only sensors I see are the mass air flow sensor in the incoming fresh air tube and the coolant temp sensor in the thermostat housing

Does any one know if there is an ambient air temp sensor on a 1999 protege with a 1.6? If so, do you know the location on the car?

Thanks,

NCmazda

 

Howdy and welcome to the forum,