Outside temperature reading wrong

E46FanaticEurope · 07-19-2022, 06:19 AM

Hi, I think my outside temperature sensor is gonna fail. The temp. is hugely jumping around (30 °C, 35, 45, 50, 32 etc., all in like 5 minutes. Is this a commonc way of sensor failing? Btw, if I connect an diagmoatic app, also the interior twmp is wrong - it ia too low. The higher the outside temp reada, the lower the inside reads. How are those two things connected? Anyway, is this the sensor failing or something else? Thanks!

AP · 07-19-2022, 06:58 AM

Certainly doesn't sound right to me

E46FanaticEurope · 07-19-2022, 07:20 AM

Quote:

Originally Posted by AP

Certainly doesn't sound right to me

It certainly isn't. I guess the temp sensor is failing. Juat wanted a confirmation from someone who has an experience with this.

BMW012 · 07-19-2022, 07:52 AM

is at the beginning of the trip or during?

E46FanaticEurope · 07-19-2022, 08:44 AM

Quote:

Originally Posted by BMW012

is at the beginning of the trip or during?

Rather during, but basically random...

AP · 07-19-2022, 10:37 AM

Out of interest., where is the sensor?

When I've hosed the car down I've noticed that that action has brought the temperature down quite a bit briefly so the water obviously gets near or on the sensor but no idea where it is

E46FanaticEurope · 07-20-2022, 02:43 AM

It's somewhere near the front passanger wheel.

Anyway, I read the codes and it's the ambient temp sensor, obviously. Will have it checked/replaced after my vacarion in Italy.

ezaircon4jc · 07-20-2022, 12:29 PM

Quote:

Originally Posted by E46FanaticEurope

It's somewhere near the front passanger wheel.

Anyway, I read the codes and it's the ambient temp sensor, obviously. Will have it checked/replaced after my vacarion in Italy.

One thing to consider is that the HVAC uses that temp sensor (among others) to adjust the inside temp.

E46FanaticEurope · 07-21-2022, 12:40 AM

Quote:

Originally Posted by ezaircon4jc

One thing to consider is that the HVAC uses that temp sensor (among others) to adjust the inside temp.

Ok, thanks, that makes sense.

E46FanaticEurope · 07-21-2022, 06:38 AM

So my check engine light is on. Checked the codes, there are several modules saying that the KOMBI module is receiving bad signal from ambient temp sensore. The question is, will this prevent DPF regen? If so, when should I expect it to get blocked? I am not in my home country and will have a chance to get the temp sensor replaced in a week (about 2000 kms).

07-19-2022, 06:19 AM	#1
E46FanaticEurope New Member 2 Rep 15 Posts Drives: e46 Join Date: Jan 2016 Location: Europa iTrader: (0)	Outside temperature reading wrong Hi, I think my outside temperature sensor is gonna fail. The temp. is hugely jumping around (30 °C, 35, 45, 50, 32 etc., all in like 5 minutes. Is this a commonc way of sensor failing? Btw, if I connect an diagmoatic app, also the interior twmp is wrong - it ia too low. The higher the outside temp reada, the lower the inside reads. How are those two things connected? Anyway, is this the sensor failing or something else? Thanks!
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07-19-2022, 06:58 AM	#2
AP Major General 2783 Rep 5,095 Posts Drives: G30 M550 Join Date: Apr 2011 Location: UK iTrader: (0)	Certainly doesn't sound right to me
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07-19-2022, 07:52 AM	#4
BMW012 Major 1008 Rep 1,176 Posts Drives: 2023 M550i CBM/Ivory Join Date: Nov 2021 Location: NJ iTrader: (0) Garage List 2025 X6 BG/Silverstone [0.00] 2023 M550i CBM/Ivory [0.00]	is at the beginning of the trip or during?
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07-19-2022, 10:37 AM	#6
AP Major General 2783 Rep 5,095 Posts Drives: G30 M550 Join Date: Apr 2011 Location: UK iTrader: (0)	Out of interest., where is the sensor? When I've hosed the car down I've noticed that that action has brought the temperature down quite a bit briefly so the water obviously gets near or on the sensor but no idea where it is
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07-20-2022, 02:43 AM	#7
E46FanaticEurope New Member 2 Rep 15 Posts Drives: e46 Join Date: Jan 2016 Location: Europa iTrader: (0)	It's somewhere near the front passanger wheel. Anyway, I read the codes and it's the ambient temp sensor, obviously. Will have it checked/replaced after my vacarion in Italy.
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07-21-2022, 06:38 AM	#10
E46FanaticEurope New Member 2 Rep 15 Posts Drives: e46 Join Date: Jan 2016 Location: Europa iTrader: (0)	So my check engine light is on. Checked the codes, there are several modules saying that the KOMBI module is receiving bad signal from ambient temp sensore. The question is, will this prevent DPF regen? If so, when should I expect it to get blocked? I am not in my home country and will have a chance to get the temp sensor replaced in a week (about 2000 kms).
	Appreciate 0 Quote