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      08-19-2014, 04:01 PM   #1
X88RED
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Exclamation Outside Temperature Reading Incorrect!!!

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Hello!

Just wondering if anyone on here has any more idea on an issue I'm getting with my outside temperature reading. Basically it's constantly showing a lower reading than normal and will sometimes even warn of ice. BMW have already replaced the sensor and the wiring and also reset the entire setup. The whole issue has now been submitted as a case to BMW for further investigation. However I was just wondering if anyone on here may have an idea of what could be causing this? Just so I can put it to BMW and maybe aid in fixing this issue. My car is a 2007 e92 m3.

Thanks in advance!

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      08-19-2014, 04:06 PM   #2
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Check in your driver's side air intake (lower apron), there is (supposed) the outside air temp probe. Maybe it's been damaged.
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      08-19-2014, 04:09 PM   #3
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Quote:
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Check in your driver's side air intake (lower apron), there is (supposed) the outside air temp probe. Maybe it's been damaged.
As far as I'm aware that's already been replaced
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      08-19-2014, 04:23 PM   #4
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I guess I was thinking this was a repeat damage. The sensor is simple, unless you've got an ECU issue or the wrong sensor (but I believe all BMW outside temp sensors are the same).
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      08-19-2014, 04:47 PM   #5
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Quote:
Originally Posted by X88RED View Post
Hello!

Just wondering if anyone on here has any more idea on an issue I'm getting with my outside temperature reading. Basically it's constantly showing a lower reading than normal and will sometimes even warn of ice. BMW have already replaced the sensor and the wiring and also reset the entire setup. The whole issue has now been submitted as a case to BMW for further investigation. However I was just wondering if anyone on here may have an idea of what could be causing this? Just so I can put it to BMW and maybe aid in fixing this issue. My car is a 2007 e92 m3.

Thanks in advance!

Redmond
Ive got exactly the same problem but mine keeps reading over. Possible +20C than it actually is.

Ive changed the sensor and had the loom sorted. Still the same problem

Its going back in
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      08-19-2014, 05:03 PM   #6
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I can usually figure out the temperature while walking to my car. If it's cold, I wear more clothes. If it's hot, I wear less. If it's wet, I carry an umbrella.
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      08-19-2014, 05:04 PM   #7
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Quote:
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I can usually figure out the temperature while walking to my car. If it's cold, I wear more clothes. If it's hot, I wear less. If it's wet, I carry an umbrella.
There's one in every forum.
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      08-19-2014, 05:14 PM   #8
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There's one in every forum.
In some forums a whole gang of jokers is the norm... I appreciate the humor, also appreciate having a temp gauge that is somewhat accurate. There are certainly a multitude of widgets to go wrong on these cars (and most all cars today). I can picture these 20-year-old M cars running around with a list of things as long as my arm that no longer work correctly.

Warranties will only be extended so long...
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      08-19-2014, 05:16 PM   #9
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Quote:
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There's one in every forum.
I'm pretty sure there's two. I'm waiting for the other to chime in any minute...



But seriously.. if the brake pedal didn't stop your car I would say you've got a problem but I've never known any vehicles temp reading to match that of anything else like say, what the cell phone weather says etc. etc.
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      08-19-2014, 05:30 PM   #10
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Quote:
Originally Posted by AlpineV8 View Post
I'm pretty sure there's two. I'm waiting for the other to chime in any minute...



But seriously.. if the brake pedal didn't stop your car I would say you've got a problem but I've never known any vehicles temp reading to match that of anything else like say, what the cell phone weather says etc. etc.
It's true, the damn thing is too close to the ground as well, where temperatures are usually higher. This probe really only affects the auto a/c settings.
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      08-20-2014, 01:48 AM   #11
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Quote:
Originally Posted by sinth View Post
Ive got exactly the same problem but mine keeps reading over. Possible +20C than it actually is.

Ive changed the sensor and had the loom sorted. Still the same problem

Its going back in

Let me know the outcome if you can. Everything seems to be pointing the ECU?
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      08-31-2014, 02:56 AM   #12
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So after BMW changing the sensor, inspecting the wiring and telling me they think they have fixed it due to a loose connection. I have just got a temperature reading of -40c showed up for about 30 seconds then returned to normal though. Any ideas?
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      09-01-2014, 12:51 AM   #13
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Originally Posted by X88RED View Post
So after BMW changing the sensor, inspecting the wiring and telling me they think they have fixed it due to a loose connection. I have just got a temperature reading of -40c showed up for about 30 seconds then returned to normal though. Any ideas?
It might be interesting to see what it reads with the sensor unplugged. If it is working fine, then you unplug the sensor and get -40C, then you can bet there is an intermittent open somewhere in the wiring.
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      09-23-2014, 06:40 AM   #14
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Still having temperature sensor problems - the car keeps warning me of ice and it seems the temperture will change every minute or two
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      10-28-2014, 08:26 AM   #15
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Just wanted to let everyone know, this issue has now been corrected and it was a faulty instrument cluster!
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