Hopefully someone can shed some light into what's going on. For the last couple of days we have been in a cold snap around -30C. I was driving the car and noticed that the ambient (outdoor) temperature sensor would read the proper temperature upon starting the car but, after driving for 15-20 minutes it would shoot up to +10-15C.
I took a look around the engine bay, and there is no visible signs of coolant leaks (even tho I know the temp sensor is behind the front bumper and has nothing to do with the engine temp). I noticed whenever I run the fan on the heat cycle (fresh outdoor) it would blast hot air which would almost burn my hand.
Whenever driving, the temperature sensor (the outdoor one not the engine temp sensor) would rise upon acceleration but whenever idle it would go back down.
I should say the dash does not light up with any of the warning lights. Turned the engine off, inspected the coolant after removing the radiator cap, and there is a bit of bubbles.. The overflow coolant container is in between full and low. I'm thinking the thermostat maybe stuck closed.. Anyone have any other suggestions what I should check. Does the outdoor ambient temperature even have anything to do with the HVAC/Engine temp?
information about the car..
2014 cx-5 2.5Gas 120,000 KM cooling system was inspected (pressure tested by mazda last year and no issues)