Displays reading wrong tempture

[TrebleTA]

My problem is this. My display in the car for my temperature is way off it's tell me its 65c then the next its -35C. I did a diagnose on the air con, it told me that the air sensor was faulty, error code 030b. so I changed the sensor. The air con now only shows 444 but my dash and air-con display is still reading -35c. is there a another sensor?
 
problem fixed its self after driving for 5-10 mins

[Wazzzer]

You tried the one behind the bumper?

[hardmonkeys]

There's a sensor on N/S behind the front bumper, might of come out its housing.



Looks like this