Outside temp sensor - Possible to calibrate?

4.2 V8 40v biturbo - 450 bhp
4.2 V8 40v biturbo - 480 bhp (plus)
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Siph3r
1st Gear
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Joined: Thu May 20, 2010 9:04 pm

Outside temp sensor - Possible to calibrate?

Post by Siph3r » Tue Apr 14, 2020 3:14 pm

My outside temp is showing apx 3 Celcius to much at any given time. I have compared to the A6 that shows more or less correct.

Changed the sensor without any luck.

Can these be calibrated/adjusted in more or less them same ways as the tank gauge via VCDS?

Thanks


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2003 RS6
2000 S8
1993 URS4

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Shoppinit
Cruising
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Joined: Wed Dec 31, 2008 6:24 pm

Re: Outside temp sensor - Possible to calibrate?

Post by Shoppinit » Tue Apr 14, 2020 3:27 pm

The outside air temp has always been total fantasy. I don't know how they got it so wrong on the RS6.

This is something that bugged me when I first got the car and I don't remember finding a way to adjust it with the Vagcom. I'm pretty sure there is no way to calibrate it with the Vagcom. I haven't looked for years, though.

Presumably it's a thermocouple type sensor. You could try putting a potentiometer in parallel with the sensor to see if you can make an offset. Not sure how that would affect linearity, though.

I seem to remember the issue with the sensor being one of location. You could try putting it somewhere where it's less sensitive to heat soak from the engine.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

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Shoppinit
Cruising
Posts: 20301
Joined: Wed Dec 31, 2008 6:24 pm

Re: Outside temp sensor - Possible to calibrate?

Post by Shoppinit » Tue Apr 14, 2020 3:31 pm

Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

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