Anyone know (or have a picture) of where the ambient temp sensor is? Mine stuck at 20 for most of the day yesterday when it was actually about 30+. Only late last night did it finally correct itself. I may just order the part and replace it myself if it isn't overly involved. I figure it may be less costly then giving the truck to the dealer for a day to diagnose it and another day to fix it.

 

Lower part of the grill between the shutters and grill

 

I thought I had a problem with mine and replaced it 3 times. I then found a thread on another site that explained what was happening. The temp sensor goes thru the computer now and some things must happen for it to go up in temperature. i believe to avoid engine heat from giving a bad reading, you must be moving above a certain speed for i believe 90 seconds to add one degree. If you stop in that period, or slow down, the clock starts again. Parked it will take 20 minutes to get that 1 degree increase. If the temperature is falling compared to the readout, the reading will correct immediately. Like I said before I have replaced mine several times only to find out nothing changed. Ford may have a way to change the update parameters in the computer for this or make the time updates quicker. I don't know right now. The sensor is on the driver's side at the very bottom of the grill in the small gap between the grill and the bumper and is black and about the size of the tip of your little finger. Curved needle nose work well to pop it off the bracket out of the hole then pull it forward outside to pop the connector off. The part is cheap but I found that it was OK and replaced it for no reason.

 

Thanks Kevin. I understand that it may take a bot to update but I drove it at least 60 kms yesterday with multiple restarts and no change so I am not sure that what you are describing is my problem.

 

Mine acted up today. I looked down at it this evening and it showed 86ºF when it was actually closer to 100ºF. As I drove around it never changed and it hadn't been 86ºF since early this morning. I got back in the truck tonight and when I hit the freeway it finally moved up to 91ºF and didn't change again on my short drive. I guess it could actually be 91ºF but it's officially 88ºF at the nearby airport. I'll see what it does next time I drive it.

 

I park my truck in a parking garage. After sitting all night, mine often times reads the parking garage temp, which is always about 68 degrees and won't change even after driving around town for most of a day.

 

I have also experienced this a couple times, it was stuck at 20ºC when it was 28ºC outside.

In both instances it eventually corrected itself after a hour.

 

So I have to replace my sensor as well. I took off the grill but was unable to locate the actual sensor. There was something just below the hood latch mechanism but it didnt look the same as the new sensor that I had. Have a 2015 F150 XTR 4WD.

 

Before changing the sensor think about this. It's a thermo-couple, two pieces of dissimilar wire attached at their ends that generates a millivolt signal. It either works or dosen't. If your display isn't what you think it should be it most likely is the module program reading the signal. Most instances of an actual failed sensor will read either -------, obscenely high or obscenely low. Which I don't know, I'm not sure how the program is configured. BTW there is another one in your dash reading the inside air temp. Look for the three horizontal slots to the right of the steering column. You'll see the two wires joined.