Inaccurate Temperature Reading?

[Rt1AWD]

What's the difference between these two temperatures? What does the car display show at that time?

Just two different sensors I assume. The main monitor tempreture somewhere in between. Interesting thing I've noticed is that after the car was on the sun and the main display shows the distorted value of the overheated car - CarScanner shows the proper temperature

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[Ford Motor Company]

Had an odd one today. It was 70° and sunny outside and my car was parked in the driveway so I remote started it to cool I down.

When I got in the car was hot and the car was blowing hot air. I turned the car on and the seat heater and the heated wheel was on. I noticed the outside temp read 49°, which obviously was wrong. I started driving thinking maybe it just needed to update the outside temp, but after a minute of driving with hot air blowing on me I manually went into the climate settings and turned it to LO and cranked the fan. At that point cold air started coming out, so I knew it wasn’t an issue with the AC.

After driving for about 2 minutes the outside temp finally started updating and quickly shot up from 49° to the correct temp of 70°. At that point I put the climate back in Auto and it was as behaving normal and blowing cold air.

From the looks of it, it thought it was much colder out than it actually was and was adjusting the climate to match that.

I don’t know if this had anything to do with the 4.2.5 HVAC update or if it was just a fluke. Anyone else have this happen?

Good morning! I would be glad to help you out with these temperature reading concerns if you like. Just shoot us a direct message with your VIN and dealer name/location, and I'll get right on it. Thank you!

 

[benk016]

From what I've seen, the temp doesn't start updating until you start driving the car.

It can be very noticeable here in Oklahoma where we might be freezing overnight and in the 80's during the day.

 

[Gullwingdmc]

From what I've seen, the temp doesn't start updating until you start driving the car.

It can be very noticeable here in Oklahoma where we might be freezing overnight and in the 80's during the day.

Yeah that’s what happened to me. It was cold overnight, but hot during the day.
I haven’t noticed this issue before though.

 

[Rt1AWD]

Good morning! I would be glad to help you out with these temperature reading concerns if you like. Just shoot us a direct message with your VIN and dealer name/location, and I'll get right on it. Thank you!

Dear Ford, could you clarify what outside temperature sensors does the car have. Which one is displayed on the main monitor and which sensors are marked as Out Temp and Out Temp 2 on the ODB2 port

 

[kodiakng]

The dongle just reads info, it does not control anything. So the worst can happen is that the hacker reads the info from your car.
On the other hand FordPass does control the car through bluetooth. That is much more dangerous

your use of the of the BT-enabled OBD-2 dongle may only read information but that doesn't mean that is all it does. you can control and change many aspects of your car's operation via OBD-2 and @Gullwingdmc is correct in being concerned about leaving it in place; especially one using BLE.

here is an old-as-the-hills article about one look at the issue:

https://arstechnica.com/information...-could-turn-commutes-into-a-scene-from-speed/

 

[metalpro2021]

Yeah that’s what happened to me. It was cold overnight, but hot during the day.
I haven’t noticed this issue before though.

I have experienced this from day 1. (may 2021 Job 1)

 

[Gullwingdmc]

Happened again today. Started at 61°, stayed like that for 5 minutes, then jumped to 81°, which was the actual temp out.

 

[Mach-Lee]

Happened again today. Started at 61°, stayed like that for 5 minutes, then jumped to 81°, which was the actual temp out.

There is supposed to be a delay updating the exterior temp on the screen when you start the vehicle, you need to drive faster than 20 MPH for 90 seconds before it will update. However the starting temperature should be a reasonable approximation of the average temperature over the past 6 hours or so, which I believe was the case here. When the temperature rises rapidly during the day like I see happened yesterday (+40ºF temp change in Boston) the reading will be behind. So I feel like the display is working correctly, or at least operating as designed. The live temp reading cannot be used because when the vehicle is stopped or moving slowly the actual temp is way too hot due to lack of airflow. I've seen the actual sensor reading spike to 125F while stopped when it's only 75F outside, so the averaging the display is necessary.

However, the HVAC should use the live or short term readings so the screen lag shouldn't affect the HVAC. And it should be responding to the interior temperature too, not just the exterior temp. I feel there are bugs affecting the proper operation of the HVAC in hot weather, but it's not from the programmed display lag.

 

[Red Hawk]

Since this is a thread on vehicle temps, can anyone tell me how to display the interior temp of my MME ('21 MME Premium AWD ER)? Manual doesn't say (that I found) and I can't find it in the controls. It does display the outside temps quite well.

 

[Gullwingdmc]

you need to drive faster than 20 MPH for 90 seconds before it will update.

The last 2 days it has taken around 4 minutes to see any change in the temp, and that is driving at 30-40 mph. When I get in the temp is frozen at whatever value it’s at and doesn’t move one degree until I drive for a few minutes, then it spikes up to the correct reading.

However, the HVAC should use the live or short term readings so the screen lag shouldn't affect the HVAC. And it should be responding to the interior temperature too, not just the exterior temp.

This is the real problem. When I remote started my car the other day it was blasting the heat and seat/wheel heaters when ti was 70° out and easily 80° in the car. With the climate in auto it continued to blast the heat and had the seat heater on for no more than 90 seconds. I had to manually override to cool it down. That has never happened in any of my ford’s, including 2 Mach-Es. Something really must be wrong with the 4.2.5 update. I’m guessing to solve the window fogging issue they put more priority on the outside temp to determine the climate settings, and that has backfired on them.

 

[Mach1E]

The last 2 days it has taken around 4 minutes to see any change in the temp, and that is driving at 30-40 mph. When I get in the temp is frozen at whatever value it’s at and doesn’t move one degree until I drive for a few minutes, then it spikes up to the correct reading.

This is the real problem. When I remote started my car the other day it was blasting the heat and seat/wheel heaters when ti was 70° out and easily 80° in the car. With the climate in auto it continued to blast the heat and had the seat heater on for no more than 90 seconds. I had to manually override to cool it down. That has never happened in any of my ford’s, including 2 Mach-Es. Something really must be wrong with the 4.2.5 update. I’m guessing to solve the window fogging issue they put more priority on the outside temp to determine the climate settings, and that has backfired on them.

Curious as to the logic behind HVAC on remote start.

Is it based on interior temp readings, or does it just use your last HVAC settings?

You say it blasts heat, but is that what you were using the last time you drove before you did the remote start?

 

[Gullwingdmc]

Curious as to the logic behind HVAC on remote start.

Is it based on interior temp readings, or does it just use your last HVAC settings?

You say it blasts heat, but is that what you were using the last time you drove before you did the remote start?

I have the remote start set to auto, not last settings. I definitely wasn’t blasting heat the previous time I drove the car.

It should be basing it off the inside temp, but I would bet money something got screwed up and it’s basing it on the outside (stuck) temp.

 

[Mach1E]

I have the remote start set to auto, not last settings. I definitely wasn’t blasting heat the previous time I drove the car.

It should be basing it off the inside temp, but I would bet money something got screwed up and it’s basing it on the outside (stuck) temp.

Maybe the workaround is to change to last settings for now?

Unfortunately “workarounds” seem like the solutions rather than waiting for the bugs to get fixed. Some may never get fixed.

 

[Gullwingdmc]

Maybe the workaround is to change to last settings for now?

Unfortunately “workarounds” seem like the solutions rather than waiting for the bugs to get fixed. Some may never get fixed.

I don’t know that last settings would be any different though because I leave it in auto all the time. So Auto and Last Settings, would be the same thing.

I had a ford rep reach out yesterday because of the problem. They just told me to bring it to the dealer ?. The dealer can’t fix Ford’s buggy software.

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