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Glow Plug Indicator

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  • 23-07-2007 9:51am
    #1
    HotRodDub
    Closed Accounts Posts: 85 ✭✭


    Hi,
    I have a 1999 TDI A4. Last weekend I noticed the water/engine temperature gauge reading a low level it usually sits at 90 degrees. I checked the oil and it was low so topped it up and things were fine until yesterday when the level went low again - but this time the glow plug indicator starting flashing - this is all whilst driving - it flashed for a minute or two and disappeared but came on again later on and continued this routine.

    I've read that the glow plug indicator may come on if the brake switch is faulty, one of my brake lights comes and goes frequently - nothing wrong with the blub and the bulb fixture is fine too so maybe the brake switch is faulty - but then would this effect all the brake lights rather than just one.

    Could it be that the glow plug indicator is coming on because of the brake switch and the engine temperature guage is unrelated or more likely they are related and the brake light fault is unrelated to them?

    Regards


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    #2
    el tel
    Registered Users Posts: 2,991 ✭✭✭el tel


    I have a TDI Passat same age and have the same glow plug warning light for 4 years now:)

    It supposedly represents a fault in the engine management system however I've had the car at the dealer and a VW specialist who both put the car on their diagnostic computer and found no fault whatsoever. Last time I went to the specialist I asked him to sort it out once and for all and he did mention that it was something to do with a temperature sensor which he (apparently) replaced to solve the issue or possibly a brake thing. (The water temp gauge always at 70oC, except when I drive at very long periods at 140kmh+ when it sometimes reaches 90oC). Anyway, the warning light still comes on, although not as fequently any more. I note that it always has come on more when it's raining...


    In short, my car drives 100% fine so I wouldn't worry about it unduely. In any case, touching the brake pedal extinguishes the light instantly:D


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