Outside temperature sensor and gauge is very slow - Fiat 124 Spider Forum
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post #1 of 12 (permalink) Old 12-23-2018, 03:06 AM Thread Starter
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Outside temperature sensor and gauge is very slow

My Spider outside temp gauge (or the sensor) is very slow at changing the indicated temp. I keep the car in warm +20c (68 fahrenheit) garage while in the outside it is -10c (14 fahrenheit). When I leave home, it takes up to 5 minutes for the gauge to start moving and up to 15 minutes for the gauge to indicate correct outside temp. I have never experienced such slow temperature meter in any other car.



Anyone else seeing this behavior?



Also, I have a question if this temp meter is used only for cockpit info, or is the same sensor used to measure motor intake air temp? If the latter (inspite of my doiubts), then I need to take the car to the dealer asap as the ECU is not using right data.
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post #2 of 12 (permalink) Old 12-23-2018, 06:39 AM
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Yes, you are correct, it is extremely slow. But it isn’t the same as the intake air temperature; using an OBD data receiver you can see the ECU temperatures used and it’s not the same.

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post #3 of 12 (permalink) Old 12-23-2018, 06:41 AM
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It is slow and always off by aprox. 5 degrees.

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post #4 of 12 (permalink) Old 12-23-2018, 07:00 AM
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Mine is similar, very slow to change from when leaving the garage and often seems to read a higher outside temperature than it really is.

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post #5 of 12 (permalink) Old 12-23-2018, 07:28 AM Thread Starter
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Ok thanks. Then it is a 'feature' and nothing to worry about. Mine is accurate, though, but it just takes time.
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post #6 of 12 (permalink) Old 12-23-2018, 08:48 AM
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Don't forget that the guys in the US have the gauge reading degF and not degC, so their "error" of 5 degF is "only" 3 degC. NBut in my experience, the gauge seems to be accurate, but I've never noticed it being slow, that could be because it's not kept in heated storage.
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post #7 of 12 (permalink) Old 12-23-2018, 03:06 PM
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Quote:
Originally Posted by azzura View Post
Don't forget that the guys in the US have the gauge reading degF and not degC, so their "error" of 5 degF is "only" 3 degC. NBut in my experience, the gauge seems to be accurate, but I've never noticed it being slow, that could be because it's not kept in heated storage.
I think that's the answer to the equation. Wherever in heck the sensor is located, it obviously takes a while to adjust to ambient outside temperature from wherever it just spent the last hours at, and to me, that makes sense.

In the winter, there are rare times when our temperatures in Canada are the same as the US.(well, maybe Alaska in the US). At -40, the temperature is the same in both F and C. lol


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post #8 of 12 (permalink) Old 12-23-2018, 04:18 PM Thread Starter
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Quote:
Originally Posted by azzura View Post
Don't forget that the guys in the US have the gauge reading degF and not degC, so their "error" of 5 degF is "only" 3 degC. NBut in my experience, the gauge seems to be accurate, but I've never noticed it being slow, that could be because it's not kept in heated storage.

Hm... Now that you said it... I need to keep an eye on that 3 celsius....
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post #9 of 12 (permalink) Old 12-23-2018, 05:10 PM
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Exactly where is the sensor located?
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post #10 of 12 (permalink) Old 12-24-2018, 10:15 AM
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I believe it’s in the left hand front fender well, behind the light cluster. A very enclosed space.

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