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External Air Temperature Sensor -- Where is it located and what is its function?

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Old Jan 18, 2005 | 06:08 PM
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Default External Air Temperature Sensor -- Where is it located and what is its function?

Where on the C5 is the external air temperature sensor located?

Other than displaying the outside temp on the A/C panel and keeping you from being able to turn on the a/c compressor when the temp is low (why??), does it do anything?
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Old Jan 18, 2005 | 06:35 PM
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Under your front fascia on the passenger side. Be thankful that's all it's used for because it's inaccurate.

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Old Jan 18, 2005 | 06:40 PM
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I thought it's primary purpose was to tell the ECM what the air temp is, so proper timing and mixture adjustments can be made.
Right ?
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Old Jan 18, 2005 | 06:55 PM
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That's the Intake Air Temperature sensor that is either in your airbridge or integrated into the MAF, depending on your MY.
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Old Jan 18, 2005 | 07:04 PM
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Excuse this question if it is obvious, but how do you check the Intake Air Temp.? I have read about some people talking about it, but I don't recal that being under the DIC gauge readings.
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Old Jan 18, 2005 | 07:10 PM
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You can use a scanning tool like EFI Live (AutoTap) or HP Tuners.
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Old Jan 18, 2005 | 10:37 PM
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Hey Patches, thanks for the pic. Do you have any idea why the computer keeps you from turning on the a/c compressor when the temp is around freezing? All my other cars let you turn it on regardless and it is nice to have to dry the air out for defogging the winshield sometimes...
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