I had the opposite problem only in severe heat where the car would indicate a temp of 24c when it was 30c. Just had my car in for a service and they said reprogramming the instrument cluster with new software fixes the issue but sadly it's not warm enough to confirm if the fix works yet ?

 

Yes, mine is the eternal optimist. No matter how miserably hot it's always a comfortable 73 degrees in Macan World.

 

I had my sensor completely go out two weeks ago. I talked with my Service Manager and he stated this has been a known problem. The only fix is to replace the sensor. The software update will not fix the problem. If you still have any warranty on your vehicle then have it scheduled for replacement. The cost is ZERO.

 

What do you mean by completely go out? Did you get no reading at all or was it was just constantly inaccurate at all times?

 

I had the check engine light come on and couldn't figure out why. Took it in to service center and they told me the sensor went bad. They replaced. Here's the funny thing…NO crap…I get in my car this afternoon and the temp was about 13 degrees off. It said it was 68 out side and it was actually 81. After driving down the road about 5 mins it jumped to the correct temperature. I was like WTF! I should have knocked on wood when I made my comments yesterday…LOL

 

Sorry if I reopen an old topic, but my Macan (MY17) continues to report (in hot weather) incorrect outside temperature (22 ° C instead 27 ° C).
I did the latest software update, nothing.
Did you solve it?
Thanks.

 

Nothing wrong with re-opening an old topic

 

Sorry, but am I the only one in the whole Forum to still have this problem?
If yes, how did you solve it?

 

There's a software update for the MFD that is supposed to fix it but it didn't fix mine. I was told there's no further fix and basically suck it up.

 

The outside temp gage on my 2018 Macan is stuck at 88 degrees.
Any thoughts or suggestions will be appreciated.

 

Mystery Solved, Went to the Dealer



I stopped by the dealer today.
Had a conversation with the Shop Foreman, this is what he said:
The Outside Temp Gage(OAT) is a little unusual. It will not change until the vehicle has traveled continually for 3 minutes. If you stop at a light or stop sign, the time starts again. In stop and go traffic it will hold the same reading.
Heres what happened to me. I call the dealer to say I was having a problem with my OAT display, and was coming in to have it checked. After driving on the freeway for a while it started working. So, I call to cancel the appointment. When I got off the freeway it stopped working again. So, I got back on the freeway and it started to work again. I thought I was loosing it... I continued to the dealership. Gage was working properly. When I spoke to the shop foreman, and told him my story he then explained to me how the system works. He scanned the computer and did not find any faults. I left feeling a little more informed.

 

That sounds like a load of crap.

I'll keep this in mind next time I'm on the road.

 

I have no idea if what the dealer said is correct but it actually makes some sense.

Your car, itself, can effect the accuracy of the temperature measurement, so to avoid that interaction, it's best to let outside air flow around the sensor for three minutes and then take the measurement. If the car stops during that period, the sensor will again be effected by the heat from your car because there is no airflow, so restart the three minute "normalization" period again.

There is actually some supportable logic behind that technical choice, if true. Of course, if this is the logic, then you will almost never get an accurate reading driving in heavy traffic or in a city with stop signs/lights.

 

Mine is saying 79 and outside temp is actually 94.
When does the warranty run out where I have to pay for the sensor? I have 23k on my 2016.

 

Add another Macan to the list. Mines a 2017 S and the temp stays around 70 to 80 while it's 95+ outside. The local service manager hooked up the diagnostic and announced that everything was ok. NO IT ISN'T!

 

Wow!! After 3+ yrs, this issue is still out there !

 

For those of you still under warranty, can you reproduce the problem when in the shop?

Maybe bring a thermometer with you & also check the current temp on your phone so you can say: "See? Weather.com says 95 ˚F & I am measuring 94 with this T-stat & you can clearly see the car says it is only 80˚F!"

How can they then deny that there is a malfunction?

 

Yep, Just talked to my neighbor who has a 2016 S like mine. We both have the "temp reading low" problem. I'll be monitoring this thread in case anyone comes up with the fix.

 

There was discussion in another thread about the outside temperature reading not changing until the car has traveled continually for 3 minutes. And if you stop at a light or stop sign, the time starts again. See post number 8 in the following thread.....

https://www.macanforum.com/forum/new-member-introductions/51937-outside-temperature-indicator.html

I have observed this in our Macan. Taking the car out of the garage on a hot summer day, the outside temperature reading might be around 75°F.....even though it's actually a 100°F day. After getting on the highway and traveling several miles, the outside temperature indication suddenly starts increasing at a rate of about 1° per second until it reaches 100°F. So it does seems that there is some algorithm at play here.

 

Mine seems accurate. Are you say if it is 100 degrees outside, when you start out, it will read 75 & then after driving 3 miles, it will read 100 & then when you stop at a light, it will again read 75? Until you again drive 3 miles.

Mine never did that.

 

....Are you say if it is 100 degrees outside, when you start out, it will read 75 & then after driving 3 miles, it will read 100 & then when you stop at a light, it will again read 75? Until you again drive 3 miles....

Oh, no, not saying that after reaching 100° it would go back down to 75° at the next stop. Just that it seems to hold its last value until the car has been in motion for several minutes. This does make sense to me. Otherwise, when the car is stopped at a light, the temperature sensor might be influenced by heat from the engine rather than just the ambient temperature.

Perhaps, however, this temperature reading hold only applies to increasing temperatures. This morning, in the garage, the outside temperature gauge was at 77° when I started the car. As soon as I backed the car out into the cool morning air, the temperature gauge rapidly dropped to 61°. Guess I'll have to watch it awhile to see how it reacts under different conditions.

 

I was hoping that mine was reading high yesterday. While on the road it was reading 101 degrees but, unfortunately, after arriving home I was able to confirm that it was indeed 101 degrees.

 

I had this problem, but it didn't concern me enough to make a special trip to the dealer for it. So it was on my list when I took my car in last month for 1-yr service. My issues were:

1) leaking rear wiper mechanism; mine was one of final builds of MY 2017 and still Porsche is building defective cars. Quite obvious that "kaizen" is a dirty word to Porsche. I knew about this known defect when I ordered the car, and expressed my disappointment to the dealer. Dealer replaced mechanism; so far so good.

2) my cameras, including all surround view cameras and rear backup camera, will black out periodically. Once again a known problem. Only happened to me once previous year but happened again a few days ago. No fix. Dealer told me that Porsche considers it acceptable if it happens once a month. Funny, when I configured "ParkAssist (Front and Rear) with Surround View" and paid $1190 for it, I don't recall anything in the description telling me that the feature might not operate once a month. And when NHTSA mandated backup cameras, did they include in their regulations a note that it's OK for a Porsche backup camera to be inoperative once a month? I don't think so!

3) last but not least is this temperature reading issue. So here's some more info about that:

I didn't know about this thread, I didn't think to search for it being a known problem. So, since it's intermittent, I went in to the dealer prepared. It happened during a recent heatwave. I had a picture of the temp reading on my dash, 75, and screen shots of various iphone apps reading 89 and 88, and a picture of my back yard thermometer reading 91.

I was upset because my dash was stuck at 75; even though I had been running errands for about an hour the temp reading didn't budge.

Reading between the lines of what my SA said, I think this is a known problem. But Porsche doesn't seem to have a list of TSBs that anyone (even the dealer) can read, apparently there's some secret method of getting info once a customer has a problem.

Anyway, dealer notes say "Found TI 38/18 9168 outside temperature display implausible". Apparently there is some sort of missing tie wrap meant to secure the wiring. Dealer ordered a new sensor from Germany. Took a week to arrive. Dealer gave me a loaner Macan so no big deal, but still I would have rather not had the problem.

Can the sensor wiring become damaged if a tie wrap is missing? Probably. It seems to be working now. But there's clearly some sort of software filtering going on. The temp sensor doesn't respond as quickly as in other cars. The dealer said that the onboard computer was using the temperature as an input. So some sort of filtering by software makes sense. It has to be software, I looked up the datasheets on some solid-state temperature sensors and it would be very unlikely if the sensors themselves behaved this way. They would either be working or be completely broken, it's very unlikely the physical sensors themselves could have such a delayed and non-linear response.

These are nits. I consider the car a 99 out of 100. I love it. But I really do wish that non-Japanese manufacturers grokked "kaizen".

 

Does anyone know what systems in the car use this temperature sensor? Is the whole climate control system using this as input? It should be looking at outdoor temperature versus cabin temperature versus desired cabin temperature in order to regulate fan speed, implement recirc. etc. How about IAT (intake air temperature) for the engine. If not used directly for IAT normally there is an ambient input required by the ECU.

If this is just a thermometer so the driver can see what the outdoor temperature is, that is one thing, but I suspect it is much more than that.

 

Does anyone know what systems in the car use this temperature sensor? Is the whole climate control system using this as input? CIt should be looking at outdoor temperature versus cabin temperature versus desired cabin temperature in order to regulate fan speed, implement record. etc. How about IAT (intake air temperature) for the engine. If not used directly for IAT normally there is an ambient input required by the ECU.

If this is just a thermometer so the driver can see what the outdoor temperature is, that is one thing, but I suspect it is much more than that.

That's a great question. I would think that the IAT would be a separate sensor. But I would be very curious to know if it is tied into the automatic climate control.

 

Mine appears reasonably accurate BUT it takes about 15 minutes to respond to changes - if i drive out of the garage at 22C and ambient is say 35C it will register the 35C after about 15 minutes!

 

Hi all

Brand new 1 week old Macan S owner (April 19 build) and temp sensor today is stuck on 7.5 degrees Celsius. Car is also showing upon start up “Fault: Service necessary Driving permitted”. Can’t believe this is a known fault since 2015 !

 

Temperature gauge reading

I've had my new 2019 Macan-S for 10 days, and I notice that the temperature gauge reading is 5 - 10 degrees less than the actual outside temperature. Can this be adjusted? Is there a significant lag time for it to display the outside temperature?

Other than that, I'm loving the car.

 

....I notice that the temperature gauge reading is 5 - 10 degrees less than the actual outside temperature.....

Not an uncommon observation. You can have a read through these earlier threads for more discussion.....

https://www.macanforum.com/forum/electronics/66977-outdoor-temp-sensor-not-accurate.html

https://www.macanforum.com/forum/new-member-introductions/51937-outside-temperature-indicator.html

 

Add me to the long list of those with this malady. It's stuck on 73F on a 96F day. As explained on another thread, it supposedly require at least 3 minutes of highway driving to read properly, yet there are those who indicate that it still malfunctions. Hopefully, ours will perform as intended when not in Stop-&-Go traffic.