406 Outside Temperature Display
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  1. #1
    Fellow Frogger! sfrawley's Avatar
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    Default 406 Outside Temperature Display

    The temperature display on my '03 406 HDI has been reading about 10C too low for the last couple of days. It has done this before but has always come good after a short time. Is this likely to be a sensor or system problem? Where is the air temperature sensor located?

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    Stephen
    '03 P406 HDI
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  2. #2
    1000+ Posts cav91's Avatar
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    On the left hand mirror. Around the bottom is where the sensor is.
    406 D8 V6 manual

  3. #3
    1000+ Posts catshamlet's Avatar
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    Far as I know it's on the underside of the passenger door mirror. As for why it's doing what it's doing, I've no idea.



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  4. #4
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    The outside air temperature registers higher than actual on our C5, particularly at higher temperatures. By way of example, when the actual temperature is 35deg, the gauge might register 38deg. I raised it as a warranty item but was advised that it was operating normally. Have seen others have similar problem. Should we just live with this? I think(?) the temperature registered impacts on the operation of the air conditioning system?

  5. #5
    Contented Peugeot Driver addo's Avatar
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    What year C5? In the first series and facelift versions, the outside temperature was indicative only - not bearing on the climate control system. I can't be sure about later ones, but note the current era Berlingo (B9) uses internal sensors to regulate its AC.

  6. #6
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    Quote Originally Posted by addo View Post
    What year C5? In the first series and facelift versions, the outside temperature was indicative only - not bearing on the climate control system. I can't be sure about later ones, but note the current era Berlingo (B9) uses internal sensors to regulate its AC.
    It is 2012 model, first purchased 2013.
    Last edited by turnbull151; 16th February 2016 at 09:55 AM.

  7. #7
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    It's measuring temperature at the mirror housing in the C5 X7, and is usually higher than official shade air temperature in summer for that reason. It isn't easy to find a location for an accurate reading on a car; everywhere is compromised. It's main purpose is to warn about the possibility of road ice in winter, and even then it's a metre above the road.

    The air conditioner sensors are internal and not part of this system.

  8. #8
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    Thanks seasink. Have researched further and can now see that determining external temperature is not a precise science for any type of car (affected by heat from road, motor etc).

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