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  1. #1
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    S3 coolant temp sensor

    hi guys, Ive had the car in the garage today due to my engine light being on, They said its showing coolant temp sensor at fault.

    Any of u guys had this problem?

    thanks Dean

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  3. #2
    Westy's Avatar
    Double Dark Side! Diesel & 8P

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    Do a search mate, the temp sensor has been covered to death.
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  4. #3
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    Will do cheers pal.

  5. #4
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    Very common issue
    This is due to it being able to alter the fuelling
    It registers the engine temp and then the fuelling is altered , a bit like the auto choke
    It is common and if left can cause an issue with the cat
    059 919 501A is the new part number for them
    Such a common issue they superceeded the part number
    It is now a 4 pin green sensor instead of the 4 pin black
    Sarah

  6. #5
    barters3's Avatar
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    i have been experiencing similar symtoms.
    would somebody be able to describe where the temp sensor is and how to change it.
    this would be much apreciated.

  7. #6
    ianysm's Avatar
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    Does it affect the way the car runs? Lumpy idle, over revving etc?
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  8. #7
    barters3's Avatar
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    I wouldnt have said that it affects the idling particularly. Its just once its up to temperature it wil drop right back down to about 60 degrees when driving along.

  9. #8
    The Doctor's Avatar
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    Had this replaced on my 2003 S3 about 2 months ago. Engine light came on, took it to C&R in Nottingham who Vagcom'd it and identified the problem as the coolant temperature sensor. Made no real difference to the way the car ran, but I guess it'd affect the fuel mixture settings if it thinks it's running hotter/colder than it actually is.

    Anyway, 45 quid & all done in 15 mins over a proper coffee in a proper mug. Replaced the standard black one with the green one & hey presto, fixed!

 

 

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