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Over temp warning light flashing when engine is cold

Discussion in 'Leon Mk1 (2000-2006)' started by Craig j, Jan 31, 2008.

  1. Craig j

    Craig j Guest

    Hi there my girlfriend was leaving work 2 days ago, she was driving for about a minute then the red warning light on the temp gauge started to flash and beep 3 times even though the gauge was still sitting at the bottom (cold), she then pulled over and turned the ignition off then back on and it went out. Any ideas could it be a sticky stat or sommit?:confused:
     
  2. traumapat

    traumapat Leon Cupra IHI

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    have a search mate. loads of info on this;)
     
  3. Craig j

    Craig j Guest

    Did a search doesnt come up with anything to do with my issue, the car isnt overheating its just the light randomly comes on as soon as the engine has started its only done it twice.
     
  4. AwesomeSarah

    AwesomeSarah Forum Sponsor

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    Could be the coolant temp sensor
    It can read that the engine is too hot as it is missreading :confused:
    Sarah
     
  5. andycupra

    andycupra status subject to change

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    this it the coolant level sensor in the expansion tank.

    it beeps 3 times right? (sorry you said that)

    i bet if you turn the ignition off/on after a few miles its fine.
    only on cold days?

    few options for you in order id try them:
    1 if the coolant level is towards the bottom of the correct range, top it up a bit (not a fix as such but can reduce incidence of beeping)
    2 scrape the sensor prongs in the coolant, (they often get a build up of scaling)
    3 replace the expansion tank. (as sensor is built in). However there has not been any update to the design and so this doesnt guarantee it wont happend again in 12/24 months time.

    the light is on the temperature gauge but is not refering to the temperature but the coolant level if its beeping 3 times.

    :)
     
    #5 andycupra, Jan 31, 2008
    Last edited: Jan 31, 2008
  6. Gnollins

    Gnollins Bosh!

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    This is a common problem mate - it's the sensor in the coolant tank.

    Fix: Take the lid off the coolant tank when COLD and use a flat-blade screw driver to scrape the two prongs that connect to the sensor. They accumulate some gunk that makes them mis-read and cause the warning light to come on. I had a this a few weeks ago and it's now fixed.

    Or you could get the coolant tank replaced at a dealer, it's a fairly cheap fix.
     
  7. Craig j

    Craig j Guest

    Yep the light comes and it beeps 3 times and funny enough it is on cold nights when she leaves work and when you turn the ignition off and back on again it resets. The temp gauge when warm never goes above 90 (the middle). It only ever does it to her lol
     
  8. Craig j

    Craig j Guest

    Il give that a shot tonight rather try cleaning it first than getting a new tank, thanks for the advice mate.

    Regrds
     
  9. andycupra

    andycupra status subject to change

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    she must be cold blooded and agrivates the issue ;)

    the coolant level is often slightly lower when very cold and seems to effect the sensor also.
    If its under warranty it can be replaced, but it will most likely happen again.

    My advice would be clean prongs and top up coolant. Only replace tank/sensor if its keep happening after this.
     
  10. Craig j

    Craig j Guest

    Yeah your prob right :whistle: lol

    I think il just go for cleaning it, Atleast i know now whats causing it. Thanks very much for the advice.
     
  11. AwesomeSarah

    AwesomeSarah Forum Sponsor

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    :blush:
    Ooops yes or the sensor in the expansion tank Doh!!!!
    Sarah
     
  12. Teasy

    Teasy Active Member

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    Mine does exactly the same!!! - I'll scrape/clean the sensors as described.

    I thought it might have been something major

    :redface:
     
  13. Gnollins

    Gnollins Bosh!

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    No probs, there was a thread on this a couple of weeks ago, that's where I got the prong-scraping tip from!

    :)
     
  14. Craig j

    Craig j Guest

    Oh well atlest when a search is carried out from now on a prop thread description name will come up. lol
     
  15. Romeoisgraham

    Romeoisgraham Mr Harris

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    I had this twice this week....... last night i topped the fluid up and scrapped the two sensors and all is fine so far.
     
  16. Number86

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    Excuse the ignorance, but what coolant fluid should I be using?
     
  17. traumapat

    traumapat Leon Cupra IHI

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    lc handbook says G12 A8D or spec TL-VW 774 D . you can buy a top up bottle. got mine from a vw dealer
     
  18. Teasy

    Teasy Active Member

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    I rang local steeler & booked it in as its still under warranty & she told me that this isnt covered as its mechanical!!!!

    [:@] I cant wait to see her [:@]
     
  19. Teasy

    Teasy Active Member

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    .......as she said theyve never had that problem with Leons before - I can smell the bulls**t from here!!!
     
  20. Number86

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    Tell her to suck your DEE.

    Then tell her she can ring half the people on this forum and ask them if it's not a problem on the leons.

    Stupid bint.
     

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